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Less invasive vascular imaging of the maxillofacial region

颌面部区域微创血管成像

基本信息

批准号：
12671824
负责人：
KURABAYASHI Tohru
金额：
$ 2.18万
依托单位：
Tokyo Medical and Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12671824/
关键词：
MRZ CT angiography

项目摘要

The goal of our investlgation was to utmze less invaslve vascuiar irnaging techniques. CT anglography and MR angiography, for the dtagnosls of maxnlofactal region in the optimai methods.The optimal imaging parameters of CT anglography were defined and applied to 23 cases with maxillofacial lesions. The injection rate of iodine contrast media should be 2 ml/sec : faster rate than that did not improve the image quality, CT angiography was extremely useful for the cases of AV malformation, however, its value was considered limited for the diagnosis of small vessels.As to MR angiography, we compared the usefulness of phase contrast and time of flight technique . The former was superior to the latter in that it could provide the vascular images of larger area and visuanze veins of slow flow more clearly. However, it requlres much longer exanaination time, which reduced the clinical validitity. We applied either of these two methods to 15 cases with maximofacial lesions. However, similar to CT anglography, its diagnostic value for small vessels, most of which were of slow flow, was considered limited. On the other hand, we also evaiuated the usefulness of Gadolinium enhanced 3D MR angiography in maxillofacial region. This technique in which contrast media extremely improve the visuanzation of small vessels may be the most optimal one providiog vascular linages of maxillofactal reglon.

我们研究的目的是使用较少侵入性的血管扩张技术。为探讨颌面部病变的CT血管造影和MR血管造影的最佳成像方法，确定了CT血管造影的最佳成像参数，并应用于23例颌面部病变。碘造影剂的注射速度以2 ml/sec为宜，超过此速度并不能提高图像质量，CT血管造影对AV畸形的诊断非常有用，但对小血管的诊断价值有限，而MR血管造影则比较了相位对比法和飞行时间技术的应用价值。前者较后者具有上级优势，能提供更大面积的血管图像，对慢血流静脉显示更清晰。但由于需要较长的检查时间，降低了临床有效性。我们应用这两种方法之一，以15例颌面部病变。然而，与CT血管造影相似，其对小血管（大多数为慢血流）的诊断价值被认为有限。另一方面，我们也评价了钆增强三维磁共振血管成像在颌面部的应用价值。该技术能极大地改善小血管的显示，是提供颌面部区域血管影像的最佳方法。