Kwok Wingchi E, You Zhigang, Monu Johnny, Seo Gwysuk, Ritchlin Christopher
Department of Imaging Sciences, University of Rochester, Rochester, New York, USA.
J Magn Reson Imaging. 2010 Jan;31(1):240-7. doi: 10.1002/jmri.21984.
To develop a dedicated radiofrequency (RF) coil for high-resolution magnetic resonance imaging (MRI) of finger joints at 3T to improve diagnostic evaluation of arthritic diseases.
A dedicated cylindrical RF receive coil was developed for imaging finger joints at 3T. A planar coil, a saddle coil, and a 1.5T coil with similar design as the dedicated coil were also constructed to compare imaging performance with the dedicated coil. A phantom was used for quantitative evaluation. Three-dimensional images were obtained on four subjects and a cadaver finger specimen using isotropic resolution of 160 mum in 9:32 minutes. The images were reviewed by two musculoskeletal radiologists.
The dedicated finger coil provided higher signal-to-noise and greater signal uniformity than the other coils. It supported high-resolution imaging that demonstrated anatomical details of the entire finger joint, and in the subject study revealed abnormalities not detectable by traditional clinical resolution.
The dedicated finger coil optimizes the potential advantages of 3T scanners compared to lower field magnets. Use of this coil should facilitate early diagnosis, improve assessment of treatment response, and provide better understanding of basic mechanisms that underlie arthritis.
研发一种用于3T场强下手指关节高分辨率磁共振成像（MRI）的专用射频（RF）线圈，以改善关节炎性疾病的诊断评估。
研发了一种用于3T场强下手指关节成像的专用圆柱形RF接收线圈。还构建了一个平面线圈、一个鞍形线圈以及一个设计与专用线圈相似的1.5T线圈，用于与专用线圈比较成像性能。使用一个体模进行定量评估。在四名受试者和一个尸体手指标本上以160μm的各向同性分辨率在9分32秒内获取三维图像。图像由两名肌肉骨骼放射科医生进行评估。
专用手指线圈比其他线圈具有更高的信噪比和更好的信号均匀性。它支持高分辨率成像，能够显示整个手指关节的解剖细节，并且在受试者研究中发现了传统临床分辨率无法检测到的异常情况。
与低场强磁体相比，专用手指线圈优化了3T扫描仪的潜在优势。使用该线圈应有助于早期诊断，改善对治疗反应的评估，并更好地理解关节炎的基本机制。
