Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line...
-
Upload
regina-west -
Category
Documents
-
view
215 -
download
0
Transcript of Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line...
![Page 1: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/1.jpg)
Jeff Binder R.T. (R)
![Page 2: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/2.jpg)
STRENGTHS WEAKNESSES Readily available Low cost Well known uses Best line pair
performance
False negatives (fx) Ionizing radiation Poor resolution Poor soft tissue
visualization Poor spacial localization C1/c2, c6/c7 hard to
visualize
Attenuating technology
![Page 3: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/3.jpg)
Rule out advanced imaging Introductory study Evaluates IVF well Not good for central canal stenosis
![Page 4: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/4.jpg)
Xray images taken in “sections” (slices)
Blurs areas that are not of interest Similar strengths and weaknesses as
plain film Attenuating technology
![Page 5: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/5.jpg)
Xray images taken of spinal cord after radiopaque contrast is injected
When used with CT it is the best tool to visualize central canal stenosis
Dr. looks for displacement of contrast on xray
Attenuating technology
![Page 6: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/6.jpg)
Headache (most common) Infections Arterial bleeding Arachnoiditis
First contrast used was air
![Page 7: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/7.jpg)
Technetium 99 radio isotope used Emission technology (from the patient) “hot spots” on scan are osteoblastic
activitySPECT: Single Photon Emission
Computerized TomographyPhosphate used as carrier molecule
PET: Positron Emission TomographyGlucose used as carrier molecule
![Page 8: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/8.jpg)
Attenuating technology Computer generated pictures Hounsfield Units Pixels and voxels Volume averaging used Slice thickness scout films used
![Page 9: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/9.jpg)
STRENGTHS WEAKNESSES
Widely available Improved soft tissue
visualization 3d imaging Accurately measure a
variety of structures Image manipulation
possible (bone and soft tissue windowing)
May be combined with myelogram for canal stenosis exam
Ionizing radiation Higher cost Intracranial artifacts Artifacts secondary to
metallic implants Radiation dose
![Page 10: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/10.jpg)
Sound waves used to form images No radiation Readily accessible Lower cost Interact with patient
![Page 11: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/11.jpg)
Emission technology (from the patient)
Hydrogen molecules used for emission
Cortex of bone=black • Due to lack of hydrogen (water molecules)
Evaluates Physiology
![Page 12: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/12.jpg)
Spinal fracture Soft tissue injury Skeletal survey for metastasis Post traumatic complications Peripheral entrapment Central canal stenosis Intracranial abnormalities Vascular imaging (MRA first choice)
![Page 13: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/13.jpg)
Magnet (field) strength depicts image quality• 1.5 tesla magnetic minimum• Larger the magnet= better image quality
RF coils are placed on or near the patient to excite the tissue
Larmor equation• Frequency of procession= gyro magnetic ratio x strength
of field
![Page 14: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/14.jpg)
White= high signal, Many H+ emitting signal
Black= low signal, No H+ emitting signal
Tr= Repetition timeTe= echo time
![Page 15: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/15.jpg)
Cortex=black CSF=black Fat=white Tr= 200-600ms Te= 25ms
![Page 16: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/16.jpg)
Cortex=black CSF=white Tr= ~1500+ ms Te= 50+ ms
![Page 17: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/17.jpg)
BOLD: Blood Oxygen Level Dependant
Physiology presented• Cortical activation• Retinotopic organization of the visual cortex• Cerebral basis for language• Mapping of the motor cortex• Memory• Studying psychiatric disorders
Advantages over PET• No ionizing radiation, less expensive, widely available, studies
can be frequently repeated
![Page 18: Jeff Binder R.T. (R). STRENGTHSWEAKNESSES Readily available Low cost Well known uses Best line pair performance False negatives (fx) Ionizing.](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e385503460f94b282f7/html5/thumbnails/18.jpg)
Fake functional Computer tricks to make a study look
like a motion study. Really a series of static images