3D-T_(2)-FFE序列结合曲面重组在骶丛神经显示中的应用  

Application of 3D-T_(2)-FFE Sequence with Curved Planar Reconstruction in the Display of Sacral Plexus

作　　者：哈婷婷 董含微 吕喆[1] 张滨[1] 那曼丽 孙丰强[1] HA Tingting;DONG Hanwei;LYU Zhe(Department of Medical Imaging,Shougang Hospital,Peking University,Beijing 100144,P.R.China)

机构地区：[1]北京大学首钢医院影像科,100144

出　　处：《临床放射学杂志》2023年第5期850-854,共5页Journal of Clinical Radiology

摘　　要：目的探讨3D-T_(2)-FFE序列结合曲面重组技术在观察骶丛神经中的应用价值。方法使用飞利浦Ingenia 1.5T XD磁共振机对招募的26例健康志愿者行盆腔T1WI轴位及3D-T_(2)-FFE序列冠状位扫描。由两名医师分别对3D-T_(2)-FFE序列扫描数据在工作站中应用曲面重组技术对各骶神经重建,观察各骶神经走行及形态并对各骶神经的骶管内段、骶管外段的显示进行评级评分。对各个骶神经骶管内段及骶管外段评级计分进行t检验。结果3D-T_(2)-FFE序列图像显示骶神经呈高信号的条索结构,周围肌肉骨骼呈低信号,骶神经与周围组织对比清晰;骶1~骶3的全程显示率分别约为100%、100%、92.3%。各个骶神经在骶管内的Ⅰ级显示率均达100%。骶管外段骶1~骶4神经的Ⅰ级显示率分别为100%、90.4%、50%及17.3%;骶2~骶4神经的Ⅱ级显示率分别为9.6%、42.3%、23.1%。对骶2~骶4各支神经骶管内段及骶管外段评级计分进行t检验:骶2神经骶管内外段显示评分对比无明显统计学意义(P>0.05),而骶3、骶4神经骶管内外段显示评分对比差异有统计学意义(P<0.01)。结论3D-T_(2)-FFE序列并曲面重组可以清晰显示各个骶丛神经骶管内段及骶1、骶2神经骶管外段形态及其周围毗邻关系,可以部分显示骶3、骶4神经骶管外段走行及形态,为临床及影像诊断提供直观、客观的影像依据。Objective To explore the value of three-dimensional T_(2)-weighted fast field echo(3D-T_(2)-FFE)sequence with curved planar reconstruction(CPR)in demonstrating sacral plexus.Methods 26 healthy volunteers which were recruited were scanned with Philips ingenia 1.5 T XD MR,including T_(2)WI axial scan and 3D-T_(2)-FFE sequence coronal scan.The scanning data were reconstructed by curved surface reconstruction(CPR)in the workstation by two doctors independently.Two doctors read the post-processing images and gave each sacral nerve grade and scores independently.Each sacral nerve was divided into internal sacral canal segment and external sacral canal segment and scored respectively.The score of two segments of each sacral nerve was tested by T-test.Results The sacral nerve showed high signal while muscles and bones showed low signal in 3D-T_(2)-FFE sequence,the contrast between sacral nerve and surrounding tissue was clear,complete displaying rate of sacral 1-sacral 3 nerves were 100%,100%,92%respectively.Grade I displaying rate of internal sacral canal segment of each sacral nerve was 100%.Grade I displaying rate of external sacral canal segment of sacral 1-sacral 4 nerves were 100%,91%,50%and 17%respectively;Grade II displaying rate of external sacral canal segment of sacral 2--sacral 4 nerves were 9%,42%and 23%respectively.T-test between the internal and external sacral canal segment of the sacral 2-4 nerves showed that,there's no statistical significance(P>0.05)between the two groups of the sacral 2 nerve while there were statistical significance(P<0.01)between the two groups of the sacral 3 and 4 nerves.Conclusion 3D-T_(2)-FFE sequence with curved planar reconstruction(CPR)can clearly display the morphology and surrounding adjacent relationship of the internal sacral canal segment of each sacral plexus nerve and the external sacral segment of sacral 1 and 2 nerve;and partially display the morphology of the external sacral canal segment of sacral 3 and 4 nerve.It's provide an intuitive and objective image basis fo

关 键 词：骶丛神经 3D-T_(2)-FFE序列 曲面重组 磁共振神经成像 

分 类 号：R445.2[医药卫生—影像医学与核医学]