Internal knee derangement assessed with 3-minute three-dimensional isovoxel true FISP MR sequence: Preliminary study
Internal knee derangement assessed with 3-minute three-dimensional isovoxel true FISP MR sequence: Preliminary study
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DOI：
10.1148/radiol.2462062092
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发表时间：
2008-02-01
期刊：
影响因子：
19.7
通讯作者：
Hodler, Juerg
中科院分区：
文献类型：
--
作者：
Duc, Sylvain R.;Pfirrmann, Christian W. A.;Hodler, Juerg
目的：以手术为参考标准，利用三维（3D）异体素序列对膝关节进行磁共振（MR）成像的准确性进行前瞻性评估，采集时间约为3分钟。材料和方法：本研究经机构审查委员会批准。所有患者均获得书面知情同意。对29例患者（女性14例，男性15例，平均年龄41岁）的30个膝关节进行前瞻性检查，采用三维异体素真快速成像与稳态进动（FISP）序列，水激发和二次多平面重构。所有患者在真正的FISP MR成像后12天内接受关节镜检查。两名盲阅读者评估磁共振图像。计算软骨缺损、前交叉韧带（ACL）和半月板撕裂检测的准确性、观察者间一致性和1种方法间一致性。结果：阅读器1的异体素真FISP成像诊断软骨缺损的总体敏感性、特异性和准确性分别为45%、83%和76%，阅读器2的总体敏感性、特异性和准确性分别为63%、82%和83%。异体素真FISP成像诊断ACL撕裂的平均（读者1和读者2）灵敏度、特异性和准确性分别为80%、95%和90%；100%， 82%和90%用于诊断内侧半月板撕裂；诊断外侧半月板撕裂的比例分别是83% 83%和83%作者所在机构使用的标准MR序列，读取器1的总体灵敏度、特异性和准确度分别为39%、83%和71%，读取器2的总体灵敏度、特异性和准确度分别为37%、85%和76%。标准MR序列诊断前交叉韧带撕裂的平均敏感性、特异性和准确性分别为70%、100%和90%；96% 77%和85%诊断内侧半月板撕裂；诊断外侧半月板撕裂的比例分别为83% 77%和78%结论：使用3D水激发异体素真FISP序列和大约3分钟的成像时间进行膝关节MR成像的诊断性能与作者所在机构使用的作为标准的MR序列的诊断性能相当。(c) rsna， 2008年。
Purpose: To prospectively evaluate the accuracy of magnetic resonance (MR) imaging of the knee performed by using a three-dimensional (3D) isovoxel sequence involving an acquisition time of approximately 3 minutes, with surgery as the reference standard.Materials and Methods: The study was institutional review board approved. Written informed consent was obtained from all patients. Thirty knees of 29 patients (14 women, 15 men; mean age, 41 years) were prospectively examined by using a 3D isovoxel true fast imaging with steady-state precession (FISP) sequence with water excitation and secondary multiplanar reformations. All patients underwent arthroscopy within 12 days after true FISP MR imaging. Two blinded readers evaluated the MR images. Accuracy for detection of cartilage defects and anterior cruciate ligament (ACL) and meniscal tears, interobserver agreement, and inter 1 method agreement were calculated.Results: Overall sensitivity, specificity, and accuracy of isovoxel true FISP imaging for the diagnosis of cartilage defects were 45%, 83%, and 76%, respectively, for, reader 1 and 63%, 82%, and 83%, respectively, for reader 2. Averaged (for readers 1 and 2) sensitivity, specificity, and accuracy of isovoxel true FISP imaging were, respectively 80%, 95%, and 90% for diagnosis of ACL tear; 100%, 82%, and 90% for diagnosis of medial meniscal tear; and 83%, 83%, and 83% for diagnosis of lateral meniscal tear. The standard MR sequences used at the authors' institution had overall sensitivities, specificities, and accuracies of 39%, 83%, and 71%, respectively, for reader 1 and 37%, 85% and 76%, respectively, for reader 2. Averaged sensitivity specificity, and accuracy of the standard MR sequences were, respectively, 70%, 100%, and 90% for diagnosis of ACL tear; 96% 77% and 85% for diagnosis of medial meniscal tear; and 83%, 77%, and 78% for diagnosis of lateral meniscal tear.Conclusion: The diagnostic performance of knee MR imaging performed by using a 3D water excitation isovoxel true FISP sequence and an imaging time of approximately 3 minutes is comparable to the diagnostic performance of the MR sequences used as standards at the authors' institution. (C) RSNA, 2008.