Guyer B H, Levinsohn E M, Fredrickson B E, Bailey G L, Formikell M
AJR Am J Roentgenol. 1985 Nov;145(5):911-9. doi: 10.2214/ajr.145.5.911.
Eighteen CT examinations were performed in 10 patients for the evaluation of acute intraarticular fractures and their follow-up. Fractures comparable to those in the patients were created in cadavers. The normal anatomy and the traumatically altered anatomy of the calcaneus in the axial, coronal, and sagittal planes are demonstrated by CT and corresponding anatomic sections. Scanning was performed in the axial plane, with subsequent reconstruction in the coronal and sagittal planes. The axial scans show disruption of the inferior part of the posterior facet, calcaneocuboid joint involvement, and widening of the calcaneus. The coronal scans show disruption of the superior part of the posterior facet, sustentaculum tali depression (involvement of middle and anterior facets), peroneal and flexor hallucis longus tendon impingement, and widening and height loss of the calcaneus. The sagittal scans show disruption of the posterior facet, calcaneocuboid joint involvement, and height loss of the calcaneus and allow the evaluation of Boehler's and Gissane's angles. All three planes show the position of major fracture fragments. Radiation dose to the foot was measured to be 0.1 rad (0.001 Gy) for plain film radiography (five exposures), 18 rad (0.18 Gy) for conventional tomography (20 cuts), and 2.6 rad (0.026 Gy) for axial CT examination.
对10例患者进行了18次CT检查，以评估急性关节内骨折及其随访情况。在尸体上制造了与患者类似的骨折。通过CT和相应的解剖切片展示了跟骨在轴位、冠状位和矢状位的正常解剖结构以及创伤性改变后的解剖结构。扫描在轴位平面进行，随后在冠状位和矢状位平面进行重建。轴位扫描显示后关节面下部中断、跟骰关节受累以及跟骨增宽。冠状位扫描显示后关节面上部中断、载距突凹陷（中关节面和前关节面受累）、腓骨长肌腱和拇长屈肌腱受压以及跟骨增宽和高度降低。矢状位扫描显示后关节面中断、跟骰关节受累以及跟骨高度降低，并可评估Boehler角和Gissane角。所有三个平面均显示主要骨折碎片的位置。足部的辐射剂量测量结果为：平片摄影（五次曝光）为0.1拉德（0.001戈瑞），传统体层摄影（20层）为18拉德（0.18戈瑞），轴位CT检查为2.6拉德（0.026戈瑞）。
