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目的:通过改变常规3D TOF MRA扫描参数,克服不能进行从主动脉弓到颈内外动脉分叉大范围成像的限制,探讨其在颈动脉血管成像中的应用价值。方法:对108例脑血管病患者进行颈动脉3D TOF MRA检查。主要是去除扫描选项中ZIP2,增加扫描块,满足从主动脉弓至颈内外分叉处的大范围成像。图像经MIP、MPR、VR处理,由两名高年资MR诊断医师分别对双侧颈总、颈内外、椎动脉进行成像质量分析。结果:3D TOF MRA共观察血管864支,其中显示清晰且正常者672支;血管显示不清17支,先天变异17支,管壁不光滑73支,血管狭窄63支,血管闭塞9支,血管未显示5支,受压移位4支,血管膨大4支,即显示不清、变异及病变者共计192支。结合原始图像分析,均能达到诊断要求。结论:3D TOF MRA作为一种无创的、不用对比剂的成像方法,用于颈动脉狭窄的筛选,具有较好的临床应用价值。
OBJECTIVE: To overcome the limitations of the conventional 3D TOF MRA scan and to overcome the limitations of the inability to perform extensive imaging from the aortic arch to the internal and external carotid bifurcation and to explore its value in carotid artery angiography. Methods: Carotid 3D TOF MRA was performed in 108 patients with cerebrovascular disease. Mainly remove the scan option ZIP2, increase the scan block to meet the wide range of imaging from the aortic arch to the internal and external bifurcation. The images were processed by MIP, MPR and VR. Two senior MR diagnostic physicians performed image quality analysis of the bilateral common carotid, internal and external cervical vertebral arteries respectively. Results: 3D TOF MRA showed a total of 864 blood vessels, of which 672 were clear and normal; 17 were abnormal, 17 were inborn, 73 were unsmooth, 63 were stenosed, 9 were occluded, 9 were vascular, Not shown in 5, pressure shift 4, vascular enlargement 4, that is, unclear, variation and lesions a total of 192. Combined with the original image analysis, can meet the diagnostic requirements. Conclusion: 3D TOF MRA is a noninvasive, contrast-free imaging method for the screening of carotid artery stenosis and has good clinical value.