Constitutional Alignment in Osteoarthritic and Healthy Chinese

A flat-panel digital radiography(DR) equipment (Siemens DR AXIOM Aristos AX/VX) was used to capture full-length bipedal lower extremities in a standing position. The technician moved the detector from top to bottom, capturing four parts: the bilateral hip joints, femur, tibia and fibula and ankle joint. The exposure parameters for each part were as follows: 1st exposure - 85kV, 75mAs; 2nd exposure - 80kV, 50mAs; 3rd exposure - 75kV, 40mAs; 4th exposure - 68kV, 20mAs. The distance from the source (kv-kg) was 300cm, and the field of view was 43.18cm x 43.18cm. All 4 X-rays were stitched using the Siemens DR Station.