With IRB approval (#51053) and informed consent, one male with no history of hip pain or pathology was imaged (32 years old, 177 cm, 73 kg, BMI 23.3). An orthopaedic surgeon performed the three exams (Figure 6). 280 ± 5 frames were collected per exam. Radiation settings were 87 kVp/3.3 mA (fluoro 1) and 88 kVp/3.4 mA (fluoro 2). CT images of the entire pelvis, proximal femur, and knee were acquired with a Siemens SOMATOM Definition CT Scanner (0.7 mm slice thickness, 355 mm FOV, 512 × 512 matrix) and bones were segmented with Amira. Model-based tracking and filtering of results was completed as described above. Outcome measures included joint angles, translations, bone-bone distance, and videos of bone motion.