White E M, Edelman R R, Wedeen V J, Brady T J
Radiology. 1986 Oct;161(1):245-9. doi: 10.1148/radiology.161.1.3763874.
Intravascular signal from flowing blood is frequently observed on magnetic resonance (MR) images and may be indistinguishable from partial or complete vascular occlusion caused by thrombus or tumor. With a phase-display reconstruction method, qualitative assessment of large-vessel patency within the abdomen was undertaken in 15 healthy subjects and 12 patients with angiographically or surgically documented intravascular thrombus or tumor. Computed tomographic (CT) scans were available in all patients for correlation. MR studies were performed with a multisection spin-echo pulse sequence and two-dimensional Fourier transform spatial encoding. Data acquired from a single sequence was reconstituted in two ways to provide both routine anatomic images and a pictorial representation of large-vessel flow on a phase-sensitive image. With this method, reliable and easy differentiation of intraluminal thrombus and tumor from blood flow signal within large vessels was achieved. Information from these phase-display images compared favorably with findings from angiography and contrast-enhanced CT in the determination of luminal patency and obstruction.
在磁共振（MR）图像上经常能观察到来自流动血液的血管内信号，它可能与由血栓或肿瘤引起的部分或完全血管闭塞难以区分。采用相位显示重建方法，对15名健康受试者和12名经血管造影或手术证实存在血管内血栓或肿瘤的患者进行了腹部大血管通畅性的定性评估。所有患者均有计算机断层扫描（CT）用于对照。采用多层面自旋回波脉冲序列和二维傅里叶变换空间编码进行MR研究。从单个序列获取的数据以两种方式重建，以提供常规解剖图像和大血管血流在相位敏感图像上的图像表示。通过这种方法，实现了在大血管内可靠且容易地区分腔内血栓和肿瘤与血流信号。在确定管腔通畅性和阻塞方面，这些相位显示图像的信息与血管造影和对比增强CT的结果相比具有优势。
