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. 2021 Jun 24;3(3):e200456. doi: 10.1148/ryct.2021200456

Figure 13:

(A) Image from CEMRA demonstrates a complex type B dissection. (B) Image from 4D flow MRI velocity MIP during systole reveals several large, relatively high-velocity jets entering an aneurysmal segment of the false lumen (*) at the proximal DAo (white arrows) and impinging on the false lumen wall. (C) In diastole, there is retrograde flow into the true lumen at these sites (white arrows), with an additional fenestration in the distal DAo seen only due to diastolic flow (red arrow). This fenestration was not seen at CT. (Reprinted, with permission, from reference 49). AAo = ascending aorta, CEMRA = contrast material–enhanced MR angiogram, DAo = descending aorta, MIP = maximum intensity projection, 4D = four dimensional.

(A) Image from CEMRA demonstrates a complex type B dissection. (B) Image from 4D flow MRI velocity MIP during systole reveals several large, relatively high-velocity jets entering an aneurysmal segment of the false lumen (*) at the proximal DAo (white arrows) and impinging on the false lumen wall. (C) In diastole, there is retrograde flow into the true lumen at these sites (white arrows), with an additional fenestration in the distal DAo seen only due to diastolic flow (red arrow). This fenestration was not seen at CT. (Reprinted, with permission, from reference 49). AAo = ascending aorta, CEMRA = contrast material–enhanced MR angiogram, DAo = descending aorta, MIP = maximum intensity projection, 4D = four dimensional.