Reference Manual Addendum - Hitachi Healthcare · QS4-66443v2 i Revision History and Essential...

Reference Manual Addendum

Hitachi Medical Systems America, Inc.

2.1 Software Supplement


Copyright© 2010 by Hitachi Medical Systems America, Inc. All rights reserved.

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iQS4-66443v2

Revision History and Essential Prescribing Information

Manual Revision

Revision Date Comments Version Effective PagesQS4-66443v1 January 2010 Initial 2.1 AllQS4-66443v2 January 2011 Revision 2.1 All

Software RevisionThis manual supports Echelon MRI Software Version 2.1.

Essential Prescribing InformationThe software described in this manual is designed to operate specifi cally with the Echelon MRI system. Elements of the prescribing information not found in this document may be found in the Echelon Reference Manual.

iiiQS4-66443v2

Table of Contents

Revision History and Essential Prescribing Information ................ i

Manual Revision .........................................................................i

Software Revision .......................................................................i

Essential Prescribing Information .............................................i

Table of Contents ............................................................................ iii

New Features of the 2.1 Software ..................................................1

Introduction ...............................................................................1

Chapter 1: Safety .......................................................................1

Chapter 2: Emergency Procedures ...........................................1

Chapter 3: System Overview .....................................................2

1. Enhanced START Button Functionality ................................................... 2

2. Improved Function Key Capability .......................................................... 2

3. System Date Change Confi rmation .......................................................... 4


Copyright© 2010 by Hitachi Medical Systems America, Inc. All rights reserved.iv

Chapter 4: Patient Information Functions ................................5

1. Disk Storage Space Indicators on Launcher Toolbar ............................... 5

2. Transmitting/Viewing Color Images ........................................................ 6

3. Patient Registration Window Enhancements ............................................ 7

4. Adding Additional Studies in the Patient Directory Window ................ 10

Chapter 5: Exam Window Scanning Functions ...................... 11

1. Regional Shim Improvements .................................................................11

2. Coils Displayed in Alphabetical Order ....................................................11

3. Improvement of Position Link................................................................ 12

Chapter 6: Scan Parameters .................................................. 13

1. 3D TOF Improvements ........................................................................... 13

2. Updating of Recon Slice ........................................................................ 13

3. Nested S-Map ......................................................................................... 14

4. Changes to RAPID RCM ....................................................................... 15

5. New Respiratory Gating Mode ............................................................... 15

6. Improvement to Silent Mode .................................................................. 16

Chapter 7: Review and Filming Functions ............................. 17

1. New Layout Selector Window ................................................................ 17

2. Enhanced Sorting Capability in Series Selector Window ...................... 18

3. Drawing Circular or Square ROIs .......................................................... 19

4. Revamped Intersection Line Tool Window ............................................ 20

5. Improvement to Measurement Tools ...................................................... 20

6. New Filming Tool and FilmReview Window Settings ........................... 20

7. New Layout Editor Setting ..................................................................... 23

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Table of Contents

Chapter 8: Post Processing Functions................................... 24

1. New MIP Setting Fields ......................................................................... 24

2. Improvements to MIP Image Preview Function ..................................... 24

3. New Maximize Image Feature for MIP Viewports ................................ 25

4. Zoom and Pan Saved in MIP Image Output ........................................... 26

5. New Default for 3DAI List ..................................................................... 27

6. Improvement to Addition of Radial Slices in MIP Task ......................... 28

7. New MPR Setting Parameter.................................................................. 30

8. Opacity Curve Window Improvements in Task Volume Rendering ...... 31

1QS4-66443v2

New Features of the 2.1 Software

IntroductionThis supplement contains descriptions and explanations of the new features of Echelon 2.1 software.

Chapter 1: SafetyThere are no new additions to the Safety chapter.

Please refer to Chapter 1 — Safety in the Echelon MR System Reference Manual for a review of MRI safety guidelines, responsibilities, and concerns.

Chapter 2: Emergency ProceduresThere are no new additions to the Emergency Procedures chapter.

Please refer to Chapter 2 — Emergency Procedures in the Echelon MR System Reference Manual for a review of emergency procedures and concerns.

Note:Please read this manual thoroughly before using the Echelon MR system. This is a supplemental manual, and should be used in conjunction with the Echelon MR System Reference Manual


Copyright© 2010 by Hitachi Medical Systems America, Inc. All rights reserved.2

Chapter 3: System Overview

1. Enhanced START Button Functionality

The START button on the control unit can now be used to pause a scan that is currently running. The START button is located to the right of the TALK button on the control unit. The scan can be resumed by pressing the START button a second time.

2. Improved Function Key Capability

The F9, F10, F11 and F12 function keys can now be assigned shortcuts to specifi c window width (WW) and window level (WL) settings. To assign these shortcuts, proceed as follows:

a. Right-click the Launcher toolbar and click Customize from the context menu that appears.

b. In the Launcher Customization window, click Function Key Settings from the Available launcher buttons list, click Systems Settings from the Current launcher buttons/Drop-Down menus list and click the right arrow button ( ).

Start Button

Control unit

Right-click here

Note:Not all sequences can be paused once they are started. For those sequences, a message will display to inform the user that the scan cannot be paused.

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New Features

c. Click OK to save this customization and close the Launcher Customization window.

d. Click the System Settings launcher button ( ) and click Function Key Settings from the list that appears.

System Settings launcher button



e. In the Function Key Settings window, type or select the desired Window Width and Window Level settings for each of the function keys.

To use the system default settings, click Set to defaults. The actual default values are displayed in the Function Key Settings window shown above.

f. Click OK to save your WW and WL shortcut settings and close the Function Key Settings window.

3. System Date Change Confirmation

The user is now prompted to confi rm an attempt to change the system date.

When a change to the system date is attempted, the Confi rmation for changing date window is displayed, cautioning the user that the study date and image acquisition date will be incorrect if the system date is changed. The system date can still be changed by clicking OK in the Confi rmation for changing date window, but the user is advised that the system date will be inconsistent with the study and image acquisition dates.

Click to load default values

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Changes to the system date are initiated by double-clicking the time display in the system tray (the bottom right corner of the screen). This displays the Date and Time Properties window, where the system date and time can be changed.

Chapter 4: Patient Information Functions

1. Disk Storage Space Indicators on Launcher Toolbar

Local Database and Media Usage icons that indicate storage space usage can now be added to the Launcher toolbar. In the Launcher Customization window, under the Show space indicator area, select the Show used Local Database space or the Show used Media space check box to display the icons.

Select either or both check boxes to display the icons



When the Launcher toolbar is docked to the top or bottom of the console screen, disk space usage is indicated by a horizontal bar displayed below the device icon. The horizontal bar grows longer as disk space is used.

When the Launcher toolbar is docked to the left or right side of the console screen, used disk space is indicated as a percentage (%) displayed below the device icon.

2. Transmitting / Viewing Color Images

Color images can now be transmitted in a DICOM message. Additionally, grayscale images archived on CD can now be viewed in color using the DICOM CD viewer utility.

Local database icon Media icon

Launcher toolbar

Local database icon

Media icon

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New Features

Standard DICOM — Previously, the standard DICOM format did not support the transfer of color images. Now with 2.1 software, when color images are transmitted in a standard-format DICOM message, two series are transmitted. A new, color Secondary Capture series is automatically created by the system and sent along with the original, grayscale series. The Secondary Capture series is listed directly below the original series in the Patient Directory window. This created series is displayed with additional labeling (i.e., “DICOM SC”) and the date.

Enhanced DICOM — When color images are transmitted in an enhanced-format DICOM message, a single color series is transmitted.

DICOM CD viewer utility — A new icon (labeled LUT on mouseover) allows grayscale images previously burned to CD to be viewed in color in the DICOM CD viewer utility.

3. Patient Registration Window Enhancements

The Patient Registration window has been rearranged for ease of use. Changes and new features include:

Patient Information Area — Study Information that requires typed input, such as the Study ID and Study Description boxes, are now included under Patient Information. Mandatory fi elds are marked by an asterisk.

Note:Changes to DICOM settings should only be performed by your Hitachi field service engineer.



Additional patient/study information can be accessed by clicking the button below the Study Description box. When this button is clicked, Anatomical Region is hidden to allow room for the extra information.

Patient Orientation Area — Click the appropriate picture button to select patient orientation. These buttons replace the Patient Orientation list previously used to select patient orientation.

Patient and Study information has been consolidated

Click for more information, click again to hide additional information

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New Features

Anatomical Region and Protocol Areas — These two areas are now more integrated, providing an associated relationship between anatomy and protocol. The default anatomical region selection is the FAVORITES tab (explained in more detail in a subsequent paragraph).

Under Anatomical Region, click the FAVORITES, Head and Neck, Spine, Upper Extremity, Lower Extremity, Chest, Abdomen, Pelvis, or Whole Body tab to select a broad anatomical region. A more specifi c anatomical area can then be selected by clicking one of the displayed anatomy picture buttons. Protocols in the user directory that correspond to the selected anatomical area are displayed under Protocol.

Click to select one of the listed protocols, or access additional protocols by clicking Protocol Selector. This displays the Protocol Selector (Open) window, where additional protocols are available.

Click a Laterality option button to make a laterality selection.

The FAVORITES tab is a new feature under Anatomical Region. A maximum of 10 favorites can be registered from any of the eight anatomical region tabs, offering a shortcut for access to the anatomy and protocols most commonly used at your site.

To use the favorites feature:

a. To add a favorite, right-click the desired anatomy picture button and click Add to Favorites from the context menu that appears. The selected anatomy picture button is displayed the next time the FAVORITES tab is clicked.

Click one of these anatomical region tabs …

… to see and click a button that represents a more-specific area of the selected anatomical region …

… which shows corresponding saved protocols from the User directory

Right click … … then click



b. To reorder your favorites, click the FAVORITES tab, right-click the anatomy picture button that you would like to move and click Move to fi rst or Move to last from the context menu that appears.

c. To delete a favorite, click the FAVORITES tab, right-click the anatomy picture button that you would like to delete and click Delete from Favorites from the context menu that appears.

4. Adding Additional Studies in the Patient Directory Window

The Patient Registration window no longer contains a separate Study Information area or the buttons to add a study tab, duplicate a study, etc.

To add a study with 2.1 software:

a. Click the patient directory button ( ) on the Launcher toolbar. This displays the Patient Directory window.

b. Right-click the desired patient’s name from the displayed list and click Add Another Study from the context menu that appears. The Patient Registration window opens and information for an additional study can be added. If the added study is saved, it will be listed above the original study in the Patient Directory window.

Right click … … then click

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New Features

Chapter 5: Exam Window Scanning Functions

1. Regional Shim Improvements

When a regional shim is activated, it is now displayed in a more-precise size with respect to the FOV and slice stack of the selected sequence. Additionally, the regional shim box will move along with any movement of the slice group. With these improvements, the user will have fewer manipulations to perform when using regional shims.

2. Coils Displayed in Alphabetical Order

In the ScanParameterList window under Others, the Receiver Coil list now displays the receiver coil selections in alphabetical order.

With the coils organized alphabetically, the keyboard can be used to effi ciently select a coil. Follow these steps to effi ciently select a coil using the keyboard:

a. Double-click the Receiver Coil list. The Receiver Coil list is now highlighted (blue), indicating that it is active.

b. Using the keyboard, type the fi rst letter in the name of the receiver coil you wish to select. The Receiver Coil list displays the fi rst coil in the alphabetical listing with the letter you typed. In the following example, the letter “C” was typed, so the Receiver Coil list displays C-Spine, which is the fi rst coil in the alphabetical listing of coils that begins with the letter “C”.

Not highlighted Highlighted

Double-click here to highlight



d. Click the Receiver Coil arrow to see more coil options. An alphabetical listing of all coils whose names start with the letter you selected is displayed, making your search for the proper coil easier.

You can continue to select different letters from the keyboard to get an index of coils as long as the Receiver Coil list is highlighted (blue).

3. Position Link Improvements

A scan that is currently being planned can be linked to a previously-planned (or source) scan in the Copy Option window.

Click here

The parameters that link are selected and dimmed

Previously-planned (or source) scans

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New Features

A link symbol is then displayed in the Acquisition Plan window, next to the name of the scan that is being planned. This link symbol will now highlight yellow if a change is made to any of the linked source scan parameters while the “linked” scan is running (the yellow highlighted link symbol replaces the pop-up notifi cation seen in previous software).

When the Link button is clicked in the Copy Option window, the parameters that link are those that are both selected and dimmed. In the previous illustration, these include the Position, Regional Shim, Selective IR, Image, Presat, and Navi check boxes.

In the illustration below, Scan 2 is being planned and has been “linked” to Scan 1 (source scan). Notice the link symbol next to Scan 2 in the Acquisition Plan window, as well as the pale blue slice lines, indicating that the slice positions have been linked.

Link symbol

Scan being planned

Pale blue slice lines indicate slice positions have been linked



In the illustration below, Scan 2 is currently running. Scan 1 (the source scan) has been reselected, and the slice positions have been changed.

In the illustration below, Scan 2 has been reselected and is still running. The link symbol next to Scan 2 in the Acquisition Plan window is now highlighted yellow. This indicates that the parameters linked between Scan 1 and Scan 2 are no longer identical. To ensure that the linked parameters are again identical, the user should stop Scan 2, click Scan 1, then click Scan 2 to reselect it. When the linked parameters are identical, the link symbol will no longer be highlighted yellow.

Scan 2 currently running

Scan 1 reselected

Slice positions changed

Scan 2 reselectedLink symbol

Green dot icon indicates scan is running

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New Features

Chapter 6: Scan Parameters

1. 3D TOF Improvements

Improvements have been made to the 3D TOF slab profi le, the 3D TOF multi-slab combination, and the 3D TOF rephase function. These improvements should be evident when visualizing the 3D TOF data in a MIP task.

In the Rephase list, under Advanced in the ScanParameterList window, clicking Slice_Freq resulted in rephase for acceleration only. With 2.1 software, the addition of H-Slice_Freq to the Rephase list now offers rephase for both velocity and acceleration.

NOTE:HMSA recommends clicking H-Slice_Freq in the Rephase list for optimum image quality.



2. Recon Slice Updates with Slice Reject[%] Changes

The Recon Slice box now automatically updates when the Slice Reject [%] box is changed. The system calculates the Recon Slice value, and takes into account any changes made to the percentage of slices that will be rejected. This results in an accurate and updated value in the Recon Slice box.

3. S-Map Measurement Improvements

S-Map measurements performed with the TR body coil and a receiver coil tend to have irregularities when acquired in anatomical areas that are prone to motion (i.e., abdomen or heart). The position of the anatomy may be different when the TR body coil acquires data, as compared to when the receiver coil acquires data. This can lead to inaccurate image corrections and deterioration of image quality.

The Nest mode for the S-Map sequence improves the accuracy of image corrections by allowing the TR body coil and the receiver coil to scan simultaneously, acquiring the S-Map measurements in an interleaved fashion. Images are matched more accurately, and corrections are improved. The Nest mode for the S-Map sequence is most often used with abdomen and cardiac imaging.

Before changing Slice Reject[%]

After changing Slice Reject[%]. Note that Recon Slice automatically updates (90 slices minus 20 percent slice rejection equals 72 recon slices)

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New Features

4. Changes to RAPID RCM

RAPID RCM refers to the Reference Calibration Mode, which is one of the modes that can be selected for RAPID scanning. This mode uses the data from the S-MAP scan as the RAPID calibration scan (the system “references” the S-MAP data), thereby eliminating the need to perform a calibration scan for each individual RAPID scan.

With previous software, clicking RCM from the Mode list (under the RAPID area) caused the Shading list (under the Filter/Post Processing area) to default to NATURAL. With 2.1 software, clicking RCM from the Mode list no longer causes the Shading list to default to NATURAL.



5. New Respiratory Gating Mode

PERRM mode is now available when using respiratory gating. PERRM stands for Phase Encode Reordering to Reduce Motion. This mode is used to suppress respiratory motion artifacts in the phase encoding direction, without the increase in scan time normally seen with the trigger mode. The system monitors abdominal wall motion before the acquisition, then creates a “reference table” of abdominal wall position versus phase encode values. Phase encoding steps are then re-ordered, corresponding to the motion of the abdominal wall.

New parameters for PERRM mode include:

• The PERRM option in the Resp Mode list is available with 2D SE, 2D GE, 2D SG and 2D RSSG sequences.

• Two new options in the Mon.Mode list:

Auto — Abdominal wall position is monitored only during the fi rst PERRM prescan. This information is used for subsequent PERRM scans.

ON — Abdominal wall position is monitored during each PERRM prescan.

• The Mon.Time[sec] box allows you to set the amount of time that the abdominal wall position is monitored. Valid values for monitor time range from 10 to 255 seconds. HMSA recommends a monitor time of 30 to 60 seconds.

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6. Improvement to Silent Mode

Originally, use of the silent mode function would limit the maximum GC amplitude as well as reduce the slew rate to one third. This function has been improved so that silent mode no longer affects GC amplitude, and now reduces the maximum slew rate by one fourth or one half, depending on the sequence. Additionally, the parameter is now labeled Soft Sound, rather than Silent.



Chapter 7: Review and Filming Functions

1. New Layout Selector Window

Layout setting options have been added to the Review Task window. To access the layout options, click the small arrow ( ) in the upper right corner of a Review Task viewport. Point to Layout and click the desired row / column layout from the context menu that appears.

If you do not see the layout you desire in the context menu, a layout can be confi gured and added to the context menu by clicking Setting…, which displays the Layout Selector window.

Click here to access layout options

Viewport

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• The selected check boxes indicate the layouts that are displayed in the context menu. Layouts are not displayed if the check boxes are cleared.

• New layouts are created by typing or selecting a number in the Row and Column boxes in the Row/Column Selection group box. The new layout is displayed in the Preview window.

• To add a new layout to the list, click Add under the Preview window.

• To remove a layout from the list, select the desired layout check box and click Remove under the Preview window.

• To set a default layout for the Review Task window, click the layout from the list and click Set Default Layout. The current default layout is displayed to the right of the Set Default Layout button.

• Click OK to save your changes, click Cancel to close the window without saving your changes.

2. Enhanced Sorting Capability in Series Selector Window

It is now possible to sort by image position as well as acquisition time in the Series Selector window. Sorting can be accomplished by either of the following methods.

• In the Series Selector window, click View, point to Group By, and click either Acquisition Time or Position. The parameter being sorted (either



acquisition time or image position) is indicated in the upper left corner of the sorting bar.

• In the Series Selector window, drag either Acquisition Time or Position onto the sorting bar. The parameter being sorted (either acquisition time or image position) is indicated in the upper left corner of the sorting bar.

3. Drawing Circular or Square ROIs

A circular or square region of interest (ROI) can now be drawn using the SHIFT key in combination with an elliptical or rectangular ROI.

To draw a circular ROI:

a. Open a series in the Review Task window.

b. From the menu bar, click Overlays, point to Add ROI, and click Ellipse.

c. While holding the SHIFT key, drag to draw a circle around the area of interest. By holding the SHIFT key, the ellipse is constrained in both horizontal and vertical directions to produce a perfect circle.

To draw a square ROI, repeat the steps above, but click Rectangle as the ROI shape in step two.

Circular or square ROIs can also be drawn in Review, Dynamic Analysis, or CE Perfusion Analysis tasks.

Drag onto sorting bar to sort by position (currently sorted by acquisition time)

Sorting bar (darker blue colored area)

Parameter currently being sorted Sorting bar (darker blue colored area)

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4. Revamped Intersection Line Tool Window

Clicking Intersection Lines… from the View menu now displays the Intersection Line Tool window, which was previously titled Select Images. A column labeled Series Name is now included under Series List, making it easier to select the series whose slice lines will be displayed. All other window functions remain the same.

5. Improvement to Measurement Tools

Both Distance and Angle (measurement tools found by clicking Tools and pointing to Measurement on the Review Task window) have been improved. The data measurement calculations are performed more quickly. The values that display for both of these measurements (distance and angle) can now be repositioned to any location within the viewport, so as not to interfere with the anatomy display. Repositioning the distance and angle values to any other location within the viewport is a drag-and-drop operation.

6. New Filming Tool and FilmReview Window Settings

The following changes have been made to the Filming Tool and FilmReview Window.

• The icons have been moved above the fi lm sheet for easier access

• A new Skip button and Skip box have been added

• A Multi Sheet box, located under the Loading Method area, has been added



The Skip and Multi Sheet features are especially useful when fi lming chemical shift images. To use the Skip feature:

a. From the Review Task window, click a viewport to specify the series to load into the Filming Tool or FilmReview Window. In the example below, a chemical shift imaging (CSI) series was used.

b. In this example, the objective is to include in the sheet only the frames that contain a graph. As seen in the original fi lm sheet (below left), the second frame in each row contains the desirable graph frame. Therefore enter “2” in the Skip box, since there are two frames to skip between the frames that contain a graph. Additionally, since the fi rst frame is not desired to be included in the sheet, the After Selected option button in the Image Selection area is clicked, along with the upper left frame in the sheet. This confi gures the sheet to start skipping frames after the selected frame, which is the upper left frame in the sheet.

Skip button

Skip box

Multi Sheet box

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c. The Skip icon must be clicked when a value is entered or selected in the Skip box, in order to confi gure the sheet with the desired frames.

d. As seen in the resulting “skipped” fi lm sheet on the right, only the desired frames (those containing graphs) are loaded into the sheet. After each “graph” frame is displayed, two frames are skipped (the chart and image frames) and the pattern repeats.

In the Settings area (accessed by clicking on the small arrow in the upper right corner of the Filming Tool or FilmReview Window), a Multi Sheet feature has been added under the Loading Method area. This feature is very useful when fi lming chemical shift imaging (CSI), as data can be spread across multiple sheets of fi lm, then viewed on a lightbox.

Original film sheet Resulting “skipped” film sheet

ClickedClicked

2 entered here

Frame (9 shown)

Sheet

Click this arrow to access the Settings area

Settings area



The examples below demonstrate the results of a 3 x 3 layout, with “2” entered in the Multi Sheet box. Both the row and column frame order is demonstrated. Frame Order list options can only be changed when there are no images loaded on the sheet.

Row1 2 3 4 5 67 8 9 10 11 1213 14 15 16 17 18

Column1 7 13 4 10 162 8 14 5 11 173 9 15 6 12 18

The following warning displays when the layout and Multi Sheet settings can not accommodate the number of images being loaded:

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7. New Layout Editor Setting

The Layout Editor window now features a Range list, where you can specify how the selected layout gets applied. A Range list has always been available in the Layout Selector window, but is new to the Layout Editor window.

The Layout Editor window is accessed by clicking the Edit Layout button at the top of the Filming Tool or FilmReview Window.

Range list options include:

• Current Sheet Onwards — Selected layout is applied to all sheets from the current sheet onward.

• Current Sheet — Selected layout is applied to the current sheet only.

• All Sheets — Selected layout is applied to all sheets.

Range list

Edit layout



Chapter 8: Post Processing Functions

1. New MIP Setting Fields

Angle and Active Slice boxes have been added for use with sliding or expanding MIPs, as well as volume rendering. The degree of angulation can be entered in or selected from the Angle box. Valid values range from -180 to 180. A slice number can be entered in or selected from the Active Slice box. The corresponding slice will be highlighted in red in the slice stack.

2. Improvements to MIP Image Preview Function

Some MIP parameters can now be changed after clicking the Apply button in the MIP Setting area. If a new option in the 3DAI list is clicked, the preview state is maintained, the Apply button is still selectable, and the MIP images will be generated when Apply is clicked. If a new option in the Number list is clicked, the Apply button is not selectable (grayed).

This improvement is also available with volume rendering in the Task Volume Rendering window.

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3. New Maximize Image Feature for MIP Viewports

Individual viewports in the task view area can now be maximized. An individual viewport can be maximized in one of two ways:

1. Click the View menu, point to Toolbars, and click View. This displays the View Toolbar just below the menus in the Review Task window

2. Click the Maximize Image icon from the displayed View Toolbar.

OR

• Click the View menu and click Maximize Image.

An Auto Maximize Image selection is also available. Select a clipping shape (through either the MIP menu or the Clipping Shapes icon on the MIP toolbar). Return to the same drop-down menu and select Auto Maximize Image. The viewport that was selected for clipping will be maximized.

In the small grid-like display in the bottom left corner, the quadrant that represents the currently maximized viewport is highlighted in red and shaded. A different viewport can be maximized by clicking a different quadrant in this small grid-like display.

To restore the normal MIP task display, click the “R” in the small grid-like display, click the Maximize Image icon on the toolbar, or click Maximize Image on the View menu to deselect it.

Maximize image icon

Click to restore the MIP task display



4. Zoom and Pan Saved in MIP Image Output

Any zoom or pan operations that were applied in the MIP image output viewport are now saved when the Start button is clicked.

MIP image output viewport

Zoom and pan retained

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The MIP image also retains any applied zoom or pan when it is displayed as a preview image in the Patient Directory window.

5. New Default for 3DAI List

The default 3DAI list option for the MIP Setting and Volume Rendering Setting windows is now Lg. Ves (large vessel).

MIP Setting window shown, but new default also applies to Volume Rendering Setting window



6. Improvement to Addition of Radial Slices in MIP Task

When using the drag method to add slices in the radial projection mode, the new slices are now added to the center of the radial arrangement instead of the end. The Show Projection Lines button must be clicked to see the projection lines.

In the image above, fi ve slices are displayed, with the center slice (#3) located on the horizontal axis of the image.

When additional slices were added with previous software, the slices would be added after slice #5. Slice #3 would remain on the horizontal axis, but would no longer be the center slice.

In the image above, slice #3 is the active slice, which is why it is highlighted in red.

Projection line (slice)

Show Projection Lines button

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In the image above, four slices have been added using the drag method, so a total of nine slices are now displayed.

With 2.1 software, the center slice (now slice #5) is maintained along the horizontal axis. Slices have been added from the central position outward in both directions.

Slice #3 is still the active slice, and is still highlighted in red.



7. New MPR Setting Parameter

The Slant box has been added to the MPR Setting area when Parallel is selected from the Projection list. In the Slant box, type or select a value between -60 and 60, where this values represents degrees. Slice lines are set in an oblique manner, and each slice is offset from the next slice.

The following slice groups display the difference between angle and slant.

30 degree Angle 30 degree Slant

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8. Opacity Curve Window Improvements in Task Volume Rendering

The Opacity Curve window, which is used to adjust the visibility of pixel values in a volume rendering operation, has been improved and moved. Previously, this window was accessed by clicking the single button located below the three preset buttons under the Property area in the Volume Rendering Setting window.

New features and operations include:

• The Opacity list box has been added to the Volume Rendering Setting window. It allows you to select and apply an opacity adjustment function (this list box replaces the Preset list box that was previously displayed within the Opacity Curve window).

• When images are loaded into the Volume Rendering Task window, the opacity curve that corresponds to the option selected in the Opacity list is displayed as a thumbnail view at the bottom of the Volume Rendering Setting window.

Opacity list box

Opacity curve (thumbnail view)



• Double-click the thumbnail opacity curve to display the new, full-sized Opacity Curve window. Any changes made to the opacity curve are immediately refl ected in the image output viewport of the Volume Rendering Task window. Additionally, making changes to the opacity curve automatically changes the Opacity list option to *modifi ed. The changes made to the opacity curve are eliminated when a different option is clicked in the Opacity list.

Double-click here to display the new Opacity Curve window

*modified is displayed when changes are made in the Opacity Curve window

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Additional features in the Opacity Curve window:

• Save As — Click Save As to save a new or changed opacity curve as a preset. The Enter the Preset Name window appears, allowing you to name the opacity curve preset. Click OK to save the preset. The new preset name displays in the Opacity list, and when selected, the new thumbnail opacity curve displays at the bottom of the Volume Rendering Setting window (when images are loaded into the Volume Rendering Task window).

• Overwrite Save — Click Overwrite Save to overwrite a preset opacity curve. The Store Opacity Curve window appears, prompting you to overwrite the existing opacity curve.

Click Yes to overwrite the opacity curve, No to cancel the overwrite operation.

If Yes is clicked, the Opacity list changes from *modifi ed to the option that was originally selected. Click OK in the Opacity Curve window to close it and display the new thumbnail opacity curve at the bottom of the Volume Rendering Setting window.

Click



• Delete — Click Delete to delete the currently-displayed opacity curve. The Delete button is shaded (unavailable) when Default is selected in the Opacity list. However, it is available when any other Opacity list option is selected and a Save As or Overwrite Save operation has been performed.

When Delete is clicked, the Delete Opacity Curve window appears, prompting you to delete the current opacity curve. Click Yes to delete the current opacity curve, No to cancel the delete operation.

If Yes is clicked, the currently-displayed opacity curve is deleted, and Default is displayed in the Opacity list.

• OK — Click OK to save changes made to the opacity curve and close the Opacity Curve window. The Opacity list displays *modifi ed, and the thumbnail opacity curve displays the changes. However, this modifi ed thumbnail opacity curve is only temporary and is eliminated when a different option is selected from the Opacity list. A Save As or Overwrite Save operation must be performed in order to have opacity curve presets available in the Opacity list.

• Cancel — Click Cancel to close the Opacity Curve window without saving changes. If *modifi ed is displayed in the Opacity list when Cancel is clicked, the Opacity list will display the option that was originally selected along with the corresponding thumbnail opacity curve. If a Save As or Overwrite Save

39QS4-66443v2

New Features

operation has been performed, clicking Cancel simply closes the Opacity Curve window, without affecting the changes made while using these Save functions.

Drawing upon the wide experience in magnet, gradient and RF technology that has made Hitachi the recognized design innovator in patient-friendly MRI, Echelon delivers high-field clinical utility for today’s advanced imaging environment. Echelon is backed by Hitachi Medical Corporation, a recognized leader in imaging technology.

Hitachi Medical Systems America Inc.1959 Summit Commerce ParkTwinsburg, Ohio 44087Tel: 330.425.1313 800.800.3106Fax: 330.963.0749www.hitachimed.com

Hitachi Medical CorporationAkihabara UDX4-14-1 Soto-KandaChiyoda-ku, Tokyo 101-0021, JAPANTel: 81.3.3526.8407Fax: 81.3.3526.8418

© 2010 Hitachi Medical Systems America Inc.0111/DM#66443v2All rights reserved.Printed in USA

Reference Manual Addendum - Hitachi Healthcare · QS4-66443v2 i Revision History and Essential...

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