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brachial_plexus [2025/06/25 19:42] – scott | brachial_plexus [2025/06/25 21:18] (current) – scott | ||
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======Brachial Plexus MRI====== | ======Brachial Plexus MRI====== | ||
- | =====Scan Coverage and Planning===== | + | =====Anatomy===== |
+ | The brachial plexus exam can be more difficult than a standard brain or spine exam, as there is more complex anatomy, different positioning requirements, | ||
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+ | The brachial plexuses are bundles of nerves that originate from about C4/5 to T2/3 and extends into the forelimbs on both sides. When there is an injury or lesion in the brachial plexus, a patient may present with muscle atrophy or forelimb lameness without an orthopedic cause. Below are MIPs of the brachial plexus nerves in 3 planes. Keep in mind that the nerves extend deeper into the forelimb than visualized on these sequences, so the required coverage will be larger. | ||
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+ | =====Scan Coverage and Planning===== | ||
====Sagittal Plane==== | ====Sagittal Plane==== | ||
For brachial plexus scout images, add more slices on all planes to cover sternum to spine dorsally, shoulder to shoulder sagittal, and C3 to T3 axially. On the axial and dorsal scout imaging, plan the slices parallel to the center of the spinal cord. On the sagittal scout image, center the FOV on C6/7. | For brachial plexus scout images, add more slices on all planes to cover sternum to spine dorsally, shoulder to shoulder sagittal, and C3 to T3 axially. On the axial and dorsal scout imaging, plan the slices parallel to the center of the spinal cord. On the sagittal scout image, center the FOV on C6/7. | ||
- | For each patient, the FOV should be re-sized to include at least C4/5 to include the T3/4. On the dorsal scout image, add enough slices to cover out to the humeral head on both sides. **Be sure to use an ODD number of slices. This will ensure that the center slice is in true midline.** | + | For each patient, the FOV should be re-sized to include at least C4/5 to include the T3/4. On the dorsal scout image, add enough slices to cover out to the humeral head on both sides unless specifically doing a unilateral study. **Be sure to use an ODD number of slices. This will ensure that the center slice is in true midline |
- | {{:library:cspinedorscoutplan.png?500|}} {{: | + | {{::bpluexus_plan.png?600|}} |
====Axial Plane==== | ====Axial Plane==== | ||
- | There are two common variations | + | |
- | In the image below, axial slices prescribed | + | Axial coverage |
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