Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
library:shoulder_mri_guide [2025/01/16 23:54] – meuonlibrary:shoulder_mri_guide [2025/04/30 01:21] (current) – scott
Line 1: Line 1:
 =====Veterinary Shoulder MRI Guide ===== =====Veterinary Shoulder MRI Guide =====
 By: Scott Johnson MS RT (R)(MR)  By: Scott Johnson MS RT (R)(MR) 
 +The original file: {{ ::shouldermriguide.pdf |}}
  
-We are using this as an example/experiment to explore how we might share a lot of such documents and materials. +Suggested Protocol courtesy of Dr. Layla Shaikh:
  
-The original file: {{ ::shouldermriguide.pdf |}}+  * Sagittal PD FatSat 
 +  * Dorsal T1 
 +  * Dorsal T2 
 +  * Axial PD 
 +  * Axial T2 
 +  * __Optional Contrast__ 
 +  * Axial T1 
 +  * Sagittal T1 
 +  * Dorsal T1 
 + 
 +====Tips, Tricks, and Notes==== 
 + 
 +===Use of Gadolinium=== 
 + 
 +If there is a suspicion for neoplastic or infection processes, it may be helpful to include post contrast imaging 
 + 
 +===Magic Angle Artifact=== 
 + 
 +In tissues with linearly oriented fibers, it is possible that they may sit obliquely in the bore of the scanner in relation to the main magnetic field. Near a certain 'magical' angle of about 54 degrees, tissue T2 time may be prolonged, and appear artefactually bright on PD weighted sequences. To ensure any hyperintensity is real, include at least one T2 weighted imaged with a long TE of 90-100. The artifact is not dependent on imaging plane, but rather the position of the patient in the bore, so choose a plane for the T2 that best visualizes the anatomy of interest. 
 + 
 +===Imaging Parameters=== 
 + 
 +Due to small anatomy, it is important to maintain high resolution and high fidelity imaging. Where possible, minimize the number of sequences, and maximize the quality of each sequence. 
 + 
 +  * .5mmx.5mm in plane resolution; keep the matrix square!  
 +  * Use thin slices of 2 or 3mm 
 +  * Short ETL (7 for PD, 16 for T2) 
 +  * Use a higher bandwidth; shorter echo spacing will maintain good edge details 
 +  * Add NEX/Averages as needed to regain SNR; it's OK if the sequence is 7 minutes long; quality over quantity.
  
-The intention is to add pulse sequences and other detailed information. 
  
 <html> <html>