Jaspan T, Wilson M, O'Donnell H, Worthington B S, Holland I M
Department of Neuroradiology, University Hospital, Queen's Medical Centre, Nottingham.
Br J Radiol. 1988 May;61(725):351-7. doi: 10.1259/0007-1285-61-725-351.
The role of magnetic resonance imaging in the assessment of giant intracranial aneurysms was compared with angiography and contrast-enhanced computed tomography (CT) in 18 patients. The use of T1- and T2-weighted spin-echo (SE) sequences demonstrated both the presence and the evolution of thrombus within these lesions. High-velocity flow within the parent vessels and still-patent lumen could be defined as an area of absent signal. The use of even-echo rephasing (EER) sequences provided a rapid technique for demonstrating and confirming the presence of luminal flow, which is shown as areas of high signal. The combination of SE and EER techniques proved superior to CT in the assessment of thrombus and flow patterns in these lesions, as well as enabling superior demonstration of the patency of the parent vessel following surgical ligation. Computed tomography remains the most accurate method of defining the presence and location of associated calcification.
对18例患者的巨大颅内动脉瘤，比较了磁共振成像在评估中的作用与血管造影和增强计算机断层扫描（CT）的作用。使用T1加权和T2加权自旋回波（SE）序列可显示这些病变内血栓的存在及其演变。供血血管内的高速血流和仍通畅的管腔可被定义为无信号区。使用偶数回波重聚（EER）序列提供了一种快速技术来显示和确认管腔内血流的存在，血流显示为高信号区。在评估这些病变的血栓和血流模式方面，SE和EER技术的联合证明优于CT，并且在手术结扎后能更好地显示供血血管的通畅情况。计算机断层扫描仍然是确定相关钙化的存在和位置的最准确方法。
