Cobb T K, Dalley B K, Posteraro R H, Lewis R C
Texas Tech University Health Sciences Center, Lubbock.
J Hand Surg Am. 1992 Sep;17(5):843-9. doi: 10.1016/0363-5023(92)90454-w.
Magnetic resonance imaging (MRI) was used to determine cross-sectional areas and volumes of carpal canals and carpal canal contents in five cadaver specimens in an assessment of the reliability of MRI for establishing contents/canal ratios. Volumes of the carpal canals and their contents were accurately calculated from MRI with a previously described correction factor (0.8161) for carpal tunnel volumes and a calculated correction factor (1.078) for carpal tunnel contents volume. There was no significant difference between laboratory-measured or MRI-calculated ratios from either volumes (p = 0.86) or surface areas (p greater than 0.79). Cross-sectional area contents/canal ratios were significantly higher (p = 0.0001) at the level of the distal aspect of the hook of the hamate (0.54) as compared with those at the level of the distal radial styloid (0.42) and proximal metacarpals (0.44). MRI provides an effective and reliable means of determining contents/canal ratios from both cross-sectional area and volume calculations.
使用磁共振成像（MRI）来确定五个尸体标本中腕管及其内容物的横截面积和体积，以评估MRI在建立内容物/管腔比率方面的可靠性。利用先前描述的腕管容积校正因子（0.8161）和计算得出的腕管内容物体积校正因子（1.078），从MRI精确计算出腕管及其内容物的体积。实验室测量值与MRI计算出的体积比率（p = 0.86）或表面积比率（p大于0.79）之间均无显著差异。与桡骨茎突远端水平（0.42）和掌骨近端水平（0.44）相比，钩骨钩远端水平的横截面积内容物/管腔比率显著更高（p = 0.0001）（0.54）。MRI提供了一种通过横截面积和体积计算来确定内容物/管腔比率的有效且可靠的方法。
