title: Relationship between preoperative magnetic resonance imaging and surgical findings: aneurysm wall thickness on high-resolution T1-weighted imaging and contact with surrounding tissue on steady-state free precession imaging.
abstract: This study evaluated the aneurysm wall thickness by high-resolution T1-weighted imaging and the contact between the aneurysm and surrounding tissue by steady-state free precession (SSFP) imaging. The surgical findings were prospectively compared with these preoperative magnetic resonance (MR) imaging findings in 35 consecutive patients with 37 unruptured cerebral aneurysms (UCAs). The aneurysm wall was not visible in 13 UCAs, but was visible in 23. Subarachnoid space between the aneurysm and surrounding tissue was visible in 16 UCAs, a visible layer of cerebrospinal fluid (CSF) between the aneurysm and surrounding tissue in 12, and no visible layer in 7. MR imaging predicted the surgical findings in 29 UCAs (78%), showed different findings in six UCAs (16%), and two (5%) could not be evaluated due to insufficient quality of preoperative MR images. Among the UCAs with different findings, five UCAs had a partially thin wall even though high-resolution T1-weighted imaging had shown a visible wall, and one UCA showed less contact with the surrounding tissue even though the SSFP imaging had shown no visible CSF layer. In conclusion, high-resolution T1-weighted imaging and SSFP imaging provided significant additional preoperative information regarding UCAs and the surrounding tissue.
authors.affiliation: Department of Neurosurgery, Kyoto Second Red Cross Hospital, Kyoto, Japan. htenhin@nn.iij4u.or.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tenjin
authors.forename: Seisuke
authors.initials: S
authors.lastname: Tanigawa
authors.forename: Michiko
authors.initials: M
authors.lastname: Takadou
authors.forename: Takahiro
authors.initials: T
authors.lastname: Ogawa
authors.forename: Ayako
authors.initials: A
authors.lastname: Mandai
authors.forename: Masataka
authors.initials: M
authors.lastname: Nanto
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Osaka
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Nakahara
authors.forename: Masahiro
authors.initials: M
authors.lastname: Umeda
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Higuchi
mesh_terms: D000328:Adult; D000368:Aged; D001921:Brain / Q000473:pathology; D002340:Carotid Artery Diseases / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D002343:Carotid Artery, Internal / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D007089:Image Enhancement; D007090:Image Interpretation, Computer-Assisted; D021621:Imaging, Three-Dimensional; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009131:Muscle, Smooth, Vascular / Q000473:pathology* / Q000601:surgery*; D012680:Sensitivity and Specificity; D013346:Subarachnoid Space / Q000473:pathology