Article Figures & Data
Figures
- Fig 1.
A, Conventional anatomy demonstrating paired thalamic and midbrain perforating arteries. B, AOP arising as a single unpaired trunk from P1 supplying the bilateral paramedian thalami and rostral midbrain. Reprinted with permission from Amirsys Inc.
- Fig 2.
Collective extent of all 4 infarct patterns at the level of the thalamus (A) and midbrain (B) from all 37 cases superimposed.
- Fig 3.
Case 2 (A and B) and case 16 (C and D). Axial FLAIR MR images at the level the thalamus (A and C) and midbrain (B and D) demonstrate bilateral paramedian thalamic and midbrain involvement (pattern 1). Notice the hyperintense signal intensity along the pial surface of the midbrain interpeduncular fossa representing the V sign (B and D).
- Fig 4.
Case 22. Axial FLAIR (A and B) and DWI (C and D) images at the level of the thalamus (A and C) and midbrain (B and D) demonstrate infarction of the bilateral paramedian thalami without midbrain involvement (pattern 2).
- Fig 5.
Axial FLAIR MR images through the midbrain from cases 31 (A), 5 (B), and 9 (C) show a V-shaped hyperintense signal intensity along the pial surface of the midbrain at the interpeduncular fossa (the V sign).
- Fig 6.
DSA of the left vertebral injection, lateral (A) and anteroposterior (B) views, and a coronal CTA image (C) from case 23 demonstrate a large unpaired thalamic perforating artery (arrows) arising from the proximal P1 segment supplying the bilateral thalami (ie, an AOP).
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