3D-SPACE与3D-CISS序列内耳成像的比较研究  

Comparative study of MRI 3D-SPACE,3D-CISS sequences at inner-ear

作　　者：程亚宝[1] 范伟雄[1] 刘可夫[2] 孙岩[2] 

机构地区：[1]广东省梅州市人民医院磁共振科,广东梅州514031 [2]南京医科大学附属苏州医院放射科,江苏苏州215008

出　　处：《中国中西医结合影像学杂志》2016年第2期146-149,共4页Chinese Imaging Journal of Integrated Traditional and Western Medicine

摘　　要：目的 :比较MRI三维可变翻转角快速自旋回波序列(3-dimensional sampling perfection with application optimized contrast using different flip angle evolutions,3D-SPACE)、三维稳态进动结构相干(3D-constructive interference in the steady sate,3D-CISS)成像序列在内耳半规管的成像质量。方法:在1.5 T MRI仪上对15例志愿者进行检查。比较3D-SPACE和3D-CISS序列在前庭和脑干的对比信噪比(contrast to noise ratio,CNR)。用三分法评价2种序列对半规管、面神经、位听神经的显示,同样用三分法对诊断信心进行评价。结果:3D-SPACE序列的CNR和对半规管的显示与3D-CISS差异有统计学意义(P<0.05);而在面神经和听神经的显示上2种序列差异无统计学意义(P=0.059);3D-SPACE序列的诊断信心比3D-CISS序列更高(P<0.05)。结论:相比3D-CISS序列,3D-SPACE序列能更好地显示内耳半规管结构。Objective：To assess the ability of MRI to depict the semicircular canals of the inner ear by comparing results from the 3D-SPACE sequence and the 3D-CISS sequence, nethods：A 1.5 T MRI system was used to perform a study of 15 volunteers. The CNR was computed for the vestibule and pans on images with the 3D-SPACE and 3D-CISS sequences. A three-point visual score was employed for assessing the depiction of the semicircular canals and facial and vestibulocochlear nerves,another three-point score was used in assessing the diagnostic confidence. Results：The CNR and the depiction of the semicircular canals with the 3D-SPACE sequence were significantly higher than with the 3D-CISS sequence （P〈0.05）. There was no statistically significant difference in depicting the facial and the vestibulocochlear nerves （P=-0.059）. The diagnostic confidence with the 3D-SPACE sequence were significantly higher than with the 3D-CISS sequence （P〈0.05）. Conclusion：For the depiction of the semicircular canal,the 3D-SPACE sequence is superior to the 3D-CISS sequence.

关 键 词：磁共振成像 耳 内 半规管 

分 类 号：R445.2[医药卫生—影像医学与核医学]