Saupe Nadja, Prüssmann Klaas P, Luechinger Roger, Bösiger Peter, Marincek Borut, Weishaupt Dominik
Institute of Diagnostic Radiology, University Hospital Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland.
Radiology. 2005 Jan;234(1):256-64. doi: 10.1148/radiol.2341031596. Epub 2004 Nov 18.
Institutional review board approval and informed consent were obtained from 25 healthy volunteers and 15 consecutive patients with chronic wrist pain or suspected carpal mass, and 1.5- and 3-T magnetic resonance (MR) imaging of the wrist was prospectively performed with comparable sequence parameters and surface coils of the same geometric design. Imaging protocols at both field strengths included a T1-weighted spin-echo sequence, two intermediate-weighted fast SE sequences with different echo times and with and without fat saturation, and a three-dimensional fast field-echo sequence. The contrast-to-noise ratio (CNR) between muscle and bone and between bone and cartilage was calculated for both field strengths. The visibility of various anatomic structures, including the triangular fibrocartilage complex, carpal ligaments, nerves, and cartilage, was analyzed with a four-point grading scale. CNRs were significantly higher on 3-T MR images than on 1.5-T MR images (P < .001; analysis of variance) for all sequences. Visibility of the triangular fibrocartilage complex and intercarpal ligaments and cartilage was significantly better on 3-T MR images than on 1.5-T MR images (paired sign test).
获得了25名健康志愿者和15名连续的慢性腕部疼痛或疑似腕部肿物患者的机构审查委员会批准及知情同意书，并采用具有可比序列参数和相同几何设计的表面线圈，前瞻性地对腕部进行了1.5T和3T磁共振（MR）成像。两种场强下的成像方案均包括一个T1加权自旋回波序列、两个具有不同回波时间且有无脂肪抑制的中等加权快速自旋回波序列以及一个三维快速场回波序列。计算了两种场强下肌肉与骨骼之间以及骨骼与软骨之间的对比噪声比（CNR）。采用四点分级量表分析了包括三角纤维软骨复合体、腕部韧带、神经和软骨在内的各种解剖结构的可视性。对于所有序列，3T MR图像上的CNR均显著高于1.5T MR图像（P <.001；方差分析）。3T MR图像上三角纤维软骨复合体、腕骨间韧带和软骨的可视性显著优于1.5T MR图像（配对符号检验）。
