|
FIG 3. Case 7, a 76-year-old woman with an unruptured anterior communicating artery aneurysm.
A, Minimum intensity projection (MinIP) image of MR cisternography (MRC), superoinferior projection, shows the aneurysm (AN) and perianeurysmal structures. RtA2 indicates the second segment of the right anterior cerebral artery; Chiasm, optic chiasm; RtA1, first segment of the right anterior cerebral artery; LtON, left optic nerve.
B, 3D MRC, inferosuperoposterior projection, viewed from the bottom of the basal cistern, shows the firm contact of the aneurysm with the optic nerves and chiasm. RtA2, second segment of the right anterior cerebral artery; LtA2, second segment of the left anterior cerebral artery; RtON, right optic nerve; LtON, left optic nerve; FL, frontal lobe; PS, pituitary stalk.
C, 3D MR angiogram (MRA), coordinated projection as to the 3D MRC in B, shows the aneurysm with deformed dome and a bleb. LtA1 indicates the first segment of the left anterior cerebral artery; LtA2, second segment of the left anterior cerebral artery; RtA1, first segment of the right anterior cerebral artery; RtA2, second segment of the right anterior cerebral artery.
D, Fusion image of the 3D MRC and MRA shows the spatial relationship of the dome to the adjacent optic nerves and chiasm.
|