磁共振3D-Tricks技术在评估舌动脉解剖中的应用

目的 评价MR血管成像技术－三维时间分辨力对比剂动力成像(Three-dimenstional 　time-resolved imaging of contrast Kinetics，3D-Tricks)对舌动脉形态显示能力。 方法　纳入研究对象43例进行3D-Tricks序列扫描，其均无颈部和脑部血管性疾病；利用容积再现(VR)、多平面重组(MPR)及最大强度投影(MIP)技术对舌动脉进行三维重建，观察舌动脉起源、形态、走行，并测量舌动脉起始点、舌骨大角段距颈动脉分叉距离以及舌动脉起始点距舌骨大角段的距离。 结果　43例研究对象共显示86侧舌动脉，其中58侧直接起始于颈外动脉，27侧与面动脉、1侧与甲状腺上动脉共干且起始于颈外动脉。舌动脉在舌骨大角处较恒定，以颈动脉分叉为标志，舌骨大角段舌动脉位于颈动脉分叉上方45侧，平行于颈动脉分叉9侧，低于颈动脉分叉32侧。86侧舌动脉起始部内径为 (2.88±0.46) mm，距离颈动脉分叉处为 (1.33±0.62) cm，距离舌动脉舌骨大角段为 (1.28±0.61) cm。 结论　3D-Tricks技术能无创性显示舌动脉形态，并能获得活体的解剖学资料，在临床应用中具有重要的指导意义。

Anatomic evaluation of the lingual artery using magnetic resonance 3D-Tricks technique

Objective To evaluate the ability of three-dimensional time-resolved imaging of contrast kinetics(3D-Tricks) sequence for identifying the lingual artery with three-dimensional reformation technique.Methods Forty-three subjects without vascular disease of brain and neck(including 28 patients with suspected vertebrobasilar insufficiency and 15 patients who excluded metastatic brain tumor) underwent 3.0T MR scans using a 3D-Tricks sequence.Morphologic features of lingual artery were evaluated using the volume rendering(VR),multi-planar reformat(MPR) and maximum intensity projection(MIP) techniques.The distances of the origin of lingual artery from both the segment of the greater horn of hyoid bone and bifurcation of common carotid artery were measured.Results 86 lingual arteries were clearly displayed in forty-three subjects.The 58 lingual arteries directly originated from external carotid artery.27 lingual arteries originated from the facial artery and only one arised from superior thyroid artery.The position between the lingual artery segment in the greater horn of hyoid bone and the greater horn of hyoid bone were relatively constant.45 lingual arteries located in the superior to bifurcation of common carotid artery.9 arteries ran forward in parallel with bifurcation of common carotid artery.32 arteries located in the inferior to bifurcation of common carotid artery.The inner diameters of lingual artery from the origin of lingual artery were(2.88±0.46) mm.The distances of lingual artery from the bifurcation of common carotid artery to the segment of the greater horn of hyoid bone were(1.33±0.62) cm,(1.28±0.61) cm,respectively.Conclusions 3D-Tricks can clearly visualize the morphologic features of the lingual artery in vivo,which is a helpful instruction for clinical application.