Pulsatile increases in aneurysm size determined by cine phase-contrast MR angiography.
The internal flow dynamics were assessed in 16 cerebral aneurysms by cine phase-contrast magnetic resonance (MR) angiography. Six of the aneurysms were associated with subarachnoid hemorrhage and 10 were unruptured. The ruptured aneurysms demonstrated a 51% +/- 10% increase in volume between systole and diastole, while the increase in volume of the unruptured aneurysms was 17.6% +/- 8.9% (p < 0.005). The ruptured aneurysms demonstrated an approximate 1.0- to 1.5-mm increase in diameter in at least one dimension during systole. There was no relationship between aneurysm size and volumetric increases. These findings suggest that cine phase-contrast MR angiography can detect structural weakness in the aneurysmal wall. Imaging techniques that can evaluate aneurysmal wall dynamics may be useful in therapeutic planning.
Meyer
F B
FB
Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota.
Huston
J
J
Riederer
S S
SS
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002932:Cineangiography; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000503:physiopathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011673:Pulsatile Flow; D012189:Retrospective Studies; D012422:Rupture, Spontaneous; D013345:Subarachnoid Hemorrhage / Q000209:etiology