Agoada David, Kramer Patricia Ann
J Am Podiatr Med Assoc. 2019 Sep;109(5):327-344. doi: 10.7547/17-200.
Radiographic imaging of the foot is commonly performed when medical evaluation is indicated. Angular measurements between bones may be assessed as part of the examination for trauma and foot biomechanics. However, angular relationships between surfaces of the physical bone as they compare with the bone's radiographic image has had limited investigation.
For this study, 54 human feet from amputated limbs were imaged in standard radiographic views and skeletonized. Selected angular measurements were taken on each skeletonized talus and calcaneus and were compared with those taken from radiographic images using paired Student tests and linear regression analysis.
Transverse plane measurements of the talus were not significantly different ( ≥ .05), associating strongly ( = 0.67-0.75; all < .001). Most transverse and sagittal plane measurements of the calcaneus were not significantly different ( ≥ .05), with transverse plane measurements more strongly associated ( = 0.70-0.77; all < .001) than sagittal plane measurements ( = 0.35-0.78; all < .001).
Selected angular measurements of the talus and calcaneus taken from radiographic images can be compared quantitatively with the physical bone, demonstrating that angular measurements from radiographic images provide useful information concerning both of these bones. This knowledge can be applied to the understanding of the morphology of the calcaneus and talus as it relates to human foot biomechanics and should also be of use in the interpretation of the human fossil pedal record.
当需要进行医学评估时，足部的放射成像检查很常见。骨骼之间的角度测量可作为创伤和足部生物力学检查的一部分。然而，与骨骼的放射影像相比，实体骨表面之间的角度关系研究较少。
在本研究中，对54只来自截肢肢体的人脚进行标准放射影像拍摄并制成骨骼标本。在每个制成骨骼标本的距骨和跟骨上进行选定的角度测量，并使用配对t检验和线性回归分析将其与放射影像上的测量结果进行比较。
距骨的横断面测量结果无显著差异（P≥0.05），相关性很强（r = 0.67 - 0.75；所有P < 0.001）。跟骨的大多数横断面和矢状面测量结果无显著差异（P≥0.05），其中横断面测量的相关性（r = 0.70 - 0.77；所有P < 0.001）比矢状面测量的相关性（r = 0.35 - 0.78；所有P < 0.001）更强。
从放射影像上获取的距骨和跟骨选定角度测量值可与实体骨进行定量比较，这表明放射影像的角度测量可为这两块骨骼提供有用信息。这一知识可应用于理解与人类足部生物力学相关的跟骨和距骨形态，也应有助于对人类化石足部记录的解读。
