摘要
通过CT及手术病理对照,回顾分析了17例听神经瘤的MRI 表现。采用0.35TMT/S 超导成像系统常规行冠状面T_1加权及横断面T_1、T_2加权成像,层厚5mm 或10mm。CT 用薄层后颅窝扫描并分别以软组织窗及骨窗进行观察。将肿瘤按大小分组,发现大于2cm 的肿瘤即可产生囊变或出血,并压迫脑干或四脑室甚至引起梗阻性脑积水。MRI 除可发现位于内听道内的微小肿瘤外,对肿瘤囊变、出血,脑干、四脑室受压肿,瘤供血血管,肿瘤包膜及粘连情况的显示均优于CT,在骨破坏及梗阻性脑积水的显示方面与CT 相仿。
The MRI features along with CT and pathologic findings of 17 patients with acousticneuroma were analysed retrospectively.Routine transaxial T_1,T_2-weighted imaging and coronal T_1-weighted imaging were obtained using a 0.35T superconducting MT/S system,the imaging slicethick was5mm or 10mm.Thin-slice CT scan was also performed through the posterior fossa,and the CT figures ofboth soft tissue window and bone window were observed.The tumors were divided into four groupsaccording to their size.Cystic degeneration,hemorrhage,depression of brainstem or 4th ventricle occurredwhen the tumor size up to 2cm.MRI is superior to CT not only in detecting the small tumor mass in theinternal auditoryeanal,but also in featuring cystic degeneration,hemorrhage,the depression of brainstemand 4th ventricle,tumor's supplying vessels,tumor's capsule and the adhesion.MRI is similar to CT indemonstrating the bone invasion and obstructive hydrocephlus.
出处
《临床放射学杂志》
CSCD
北大核心
1993年第1期9-13,共5页
Journal of Clinical Radiology
关键词
CT
病理
听神经瘤
NMR
颅内肿瘤
MRI
Tomography
X-ray computed
Patholgy
Acoustic neuroma
