Properly Calculate Vessel and Piping Wall Temperatures During Depressuring and Relief - G.a. Melhem
Elias R. Melhem, MD MR Imaging: Basic Principles.
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Transcript of Elias R. Melhem, MD MR Imaging: Basic Principles.
![Page 1: Elias R. Melhem, MD MR Imaging: Basic Principles.](https://reader036.fdocuments.net/reader036/viewer/2022082517/56649f395503460f94c55e39/html5/thumbnails/1.jpg)
Elias R. Melhem, MDElias R. Melhem, MD
MR Imaging:
Basic Principles
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Overview
Generation of MR Image
MR Image Quality
MR Imaging Protocols for Clinical Brain Imaging
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Generation of MR Image
Nuclear magnetic resonance Spin density Spin lattice relaxation (T1) Spin spin relaxation (T2)
Spatial encoding
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MR Image Quality
Spatial Resolution
Contrast Resolution
Signal-to-Noise
Artifacts
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MR Imaging Protocols
Tailored Based on: Clinical Question
Capabilities of the MR scanner
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Basic Brain Protocol
Sagittal T1-W SE Axial T2-W FSE Axial Fast FLAIR Axial D-W (b-1000)
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Metastases and Primary Brain Tumors
Basic Brain Protocol + Gd-enhanced: Axial T1-W SE Coronal T1-W SE Fast FLAIR (Subarachnoid Metastases)
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Pediatric (Age < 2 years-old)
Basic Brain Protocol + Axial T1-W SE Coronal Phase-Sensitive Fast IR
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Pediatric (Age < 2 years-old)
Basic Brain Protocol + Axial T1-W SE Coronal Phase-Sensitive Fast IR
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Stroke Protocol
Basic Brain Protocol + 3D TOF MRA of the Circle-of-Willis Gd-based perfusion imaging
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Cervical Carotid Artery Protocol
2D TOF MRA Single slab 3D TOF MRA at the bifurcation Contrast-enhanced Coronal 3D MRA Axial T1-W SE with Fat Saturation (Dissection)
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Internal Auditory Canal Protocol
Basic Brain Protocol + High Resolution: Axial 3D T2-W FSE
Axial T1-W SE Coronal T1-W SE
with and without Gd -enhancement
May consider Fat Saturation
for post-operative evaluation
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Orbital Protocol
Basic Brain Protocol + High Resolution: Coronal STIR or FLAIR with Fat Saturation
Axial T1-W SE Coronal T1-W SE
with and without Gd -enhancement
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Pituitary Protocol
Basic Brain Protocol + High Resolution:
Sagittal T1-W SE Coronal T1-W SE
with and without Gd -enhancement
May consider Fat Saturation
for post-operative evaluation
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Epilepsy (Age < 35 year-old)
Basic Brain Protocol + Oblique Coronal: T2-W-FSE Fast FALIR Phase-Sensitive Fast IR
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Fetal Imaging
HASTE / Single Shot FSE