Craig Joseph G, Go Lily, Blechinger Joseph, Hearshen David, Bouffard J Antonio, Diamond Mark, van Holsbeeck Marnix T
Department of Diagnostic Radiology, Henry Ford Hospital, 2799 West Grand Boulevard, Detroit, MI, 48202, USA.
Skeletal Radiol. 2005 Aug;34(8):453-61. doi: 10.1007/s00256-005-0919-6. Epub 2005 Jun 21.
To assess 3-T imaging of the knee.
We reviewed 357 3-T magnetic resonance images of the knee obtained using a dedicated knee coil. From 58 patients who had arthroscopy we determined the sensitivity and specificity for anterior cruciate ligament (ACL) tear and medial and lateral meniscal tear.
A chemical shift artifact showed prominently at 3 T even after improvements had been made by increasing the bandwidth. For complete ACL tear the sensitivity was 100% (95% confidence interval, CI, 75.30-100.00), and the specificity was 97.9% (95% CI 87.7-99.9). For the medial meniscus the sensitivity was 100.00% (95% CI 90.0-100.00), and the specificity was 83.3%(95% CI 66.6-95.3). For the lateral meniscus the sensitivity was 66.7% (95% CI 38.4-88.2), and the specificity was 97.6% (95% CI 87.1-99.9).
In general 3-T imaging allows a favorable display of anatomy and pathology. The lateral meniscus was assessed to be weaker than the other anatomic structures. Three-tesla imaging allows increased signal-to-noise ratio, increased resolution, and faster scanning times.
评估膝关节的3T成像。
我们回顾了使用专用膝关节线圈获得的357例膝关节3T磁共振图像。从58例接受关节镜检查的患者中，我们确定了前交叉韧带（ACL）撕裂以及内侧和外侧半月板撕裂的敏感性和特异性。
即使通过增加带宽进行了改进，化学位移伪影在3T时仍很明显。对于完全ACL撕裂，敏感性为100%（95%置信区间，CI，75.30 - 100.00），特异性为97.9%（95%CI 87.7 - 99.9）。对于内侧半月板，敏感性为100.00%（95%CI 90.0 - 100.00），特异性为83.3%（95%CI 66.6 - 95.3）。对于外侧半月板，敏感性为66.7%（95%CI 38.4 - 88.2），特异性为97.6%（95%CI 87.1 - 99.9）。
总体而言，3T成像能够很好地显示解剖结构和病理情况。外侧半月板的评估结果显示其比其他解剖结构表现较弱。3T成像可提高信噪比、分辨率并缩短扫描时间。
