Difference between revisions of "CT angiography of the head"
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Aneurysms are more readily visualized by thick slices such as 15mm, but thin slices such as 1.2 mm still need to be observed if there may be a focal occlusion or stenosis. | Aneurysms are more readily visualized by thick slices such as 15mm, but thin slices such as 1.2 mm still need to be observed if there may be a focal occlusion or stenosis. | ||
| − | == | + | ==Basic screening== |
In addition to a '''[[CT_of_the_head#Basic_screening|Basic screening of a head CT]]''', look for: | In addition to a '''[[CT_of_the_head#Basic_screening|Basic screening of a head CT]]''', look for: | ||
*Discrepancies between the left and right side regarding contrast filling of arteries. Direct comparisons can be made between stems of major arteries, while for lesser branches it is enough to compare the overall artery coverage in cerebral and cerebellar volumes. | *Discrepancies between the left and right side regarding contrast filling of arteries. Direct comparisons can be made between stems of major arteries, while for lesser branches it is enough to compare the overall artery coverage in cerebral and cerebellar volumes. | ||
Revision as of 13:42, 14 December 2018
Author:
Mikael Häggström [notes 1]
Contents
Planning
Alternative investigations
Magnetic resonance angiography of the head is indicated in:
- Less emergent situations, since it is generally less readily available.
- Contraindications to intravenous contrast, since it can visualize cerebral vessels without it.
Constructions
Aneurysms are more readily visualized by thick slices such as 15mm, but thin slices such as 1.2 mm still need to be observed if there may be a focal occlusion or stenosis.
Basic screening
In addition to a Basic screening of a head CT, look for:
- Discrepancies between the left and right side regarding contrast filling of arteries. Direct comparisons can be made between stems of major arteries, while for lesser branches it is enough to compare the overall artery coverage in cerebral and cerebellar volumes.
- Obvious aneurysms
Diseases
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
