Evaluation of Communication between Intracranial Arachnoid Cysts and Cisterns with Phase-Contrast Cine MR Imaging
Harun Yildiza,b,
Cuneyt Erdogana,
Ramazan Yalcina,
Zeynep Yazicia,
Bahattin Hakyemeza,
Mufit Parlaka and
Ercan Tuncela
a Department of Radiology , University of Uludag, School of Medicine, Bursa, Turkey
b Department of Radiology , University of Suleyman Demirel, School of Medicine, Isparta, Turkey
View larger version (146K):
[in a new window]
|
FIG 1. A 20-year-old man with headaches and a communicating left middle cranial fossa AC (patient 10).
A, CTC shows homogeneous contrast enhancement in the cyst.
B and C, Transverse (B) and coronal (C) T2-weighted images (TR/TE/NEX, 7400/115/1) obtained before PC cine MR imaging helps in proper section orientation.
D and E, Transverse(D) and coronal (E) PC cine MR images (TR/TE/flip angle, 70/15.8/10°) show hyperintensity (arrows) arising from left chiasmatic cistern, which represents communication with the subarachnoid space.
F, Adjusting the windowing makes the flow jet (arrows) more clear.
| |
View larger version (78K):
[in a new window]
|
FIG 2. A 17-year-old male adolescent with convulsions and a left middle cranial fossa noncommunicating AC (patient 33).
A, CTC shows no contrast enhancement on delayed scan.
B, Coronal T2-weighted image (TR/TE/NEX, 7400/115/1) shows the cyst causing a mild midline shift.
C, Coronal PC cine MR image (TR/TE/flip angle, 70/15.8/10°) shows no signal intensity alteration in the cyst (arrows). Cyst and brain have the same signal intensity pattern.
| |
View larger version (142K):
[in a new window]
|
FIG 3. A 37-year-old woman with headaches and a communicating quadrigeminal cistern AC (patient 15).
A, CTC performed 2 hours after an intratechal injection of contrast agent shows no enhancement (arrow). Intracystic attenuation was 9 HU.
B, CTC at 12 hours shows mild enhancement (51 HU, arrow).
C, CTC at 24 hours shows clear enhancement (88 HU, arrow).
D and E, Transverse (D) and coronal (E) T2-weighted images (TR/TE/NEX, 7400/115/1).
F, Midsagittal PC cine MR image (TR/TE/flip angle, 70/15.8/10°) shows no evidence of communication (arrow). No signal intensity alterations were seen on transverse and coronal images (not shown).
| |
View larger version (97K):
[in a new window]
|
FIG 4. A 66-year-old woman with a type III cyst in the left middle cranial fossa (patient 9).
A, CTC 2 hours after intratechal contrast injection shows no enhancement (8 HU).
B, CTC at 12 hours shows intracystic enhancement of 46 HU.
C and D, Transverse (C) and coronal (D) T2-weighted images (TR/TE/NEX, 7400/115/1) show marked midline shift.
E and F, Transverse (E) and coronal (F) PC cine MR images (TR/TE/flip angle, 70/15.8/10°) shows evidence of a flow jet (arrows), although communication with the cisternal space is unlikely in type III cysts.
| |
