Mäurer J, Bleschkowski A, Tempka A, Felix R
Department of Radiology, Charité Hospital, Campus Virchow Clinic, Medical Faculty of the Humboldt University in Berlin, Germany.
Acta Radiol. 2000 Jan;41(1):78-83.
To make a comparative analysis of transversal tomograms obtained by high-resolution MR imaging with frozen cross-sections of an anatomical forearm specimen. Twenty-two healthy volunteers were also examined using the same coil system to test for a range of possible clinical applications and for the depiction of morphological and morphometrical values of normal anatomy in vivo.
MR images of the carpal tunnel of 22 healthy volunteers were obtained with a 1.5-T whole-body system with a 5-cm surface coil. Measurements were recorded with a field-of-view between 50x50 mm2 and 60x60 mm2 in a 256x256 pixel matrix for the T1 sequence. A slice thickness of 2 mm was used. The images were acquired using a T1-weighted SE sequence (TR/TE 500/38 ms) and a T2-weighted SE sequence (TR/TE 2000/70 ms). Additionally, a formalin-fixed anatomical forearm specimen was imaged for anatomic correlation. The imaged transversal cross-section levels in the specimen were subsequently freeze-sectioned. The anatomical structures of the MR findings were identified and compared with the macroscopical sections of the specimen.
Based on the good depiction of details at this coil system with a pixel size in T1 of 0.195x0.195 mm, high-resolution MR imaging enabled identification of the interior structures of the carpal tunnel, as well as delineation of connective tissue. The clinical value of high-resolution MR includes the diagnosis of carpal tunnel syndrome and inflammatory disorders of the wrist.
Our results support the feasibility of high-resolution MR imaging of the carpal tunnel and the wrist using small surface coils.
对通过高分辨率磁共振成像获得的横断层面图像与解剖学前臂标本的冷冻切片进行对比分析。还使用相同的线圈系统对22名健康志愿者进行检查，以测试一系列可能的临床应用，并描绘体内正常解剖结构的形态学和形态测量值。
使用配备5厘米表面线圈的1.5-T全身系统获取22名健康志愿者腕管的磁共振图像。在256×256像素矩阵中，T1序列的视野为50×50平方毫米至60×60平方毫米，记录测量数据。切片厚度为2毫米。使用T1加权SE序列（TR/TE 500/38毫秒）和T2加权SE序列（TR/TE 2000/70毫秒）采集图像。此外，对经福尔马林固定的解剖学前臂标本进行成像以进行解剖学对照。随后对标本中成像的横断层面进行冷冻切片。识别磁共振成像结果中的解剖结构，并与标本的宏观切片进行比较。
基于该线圈系统对细节的良好描绘，T1图像像素大小为0.195×0.195毫米，高分辨率磁共振成像能够识别腕管的内部结构以及结缔组织的轮廓。高分辨率磁共振成像的临床价值包括诊断腕管综合征和腕部炎症性疾病。
我们的结果支持使用小型表面线圈对腕管和腕部进行高分辨率磁共振成像的可行性。
