Abstract: With the improvement of economic level, the requirement to achieve quality of life is increased. An increasing number of individuals are undergoing joint replacement surgery due to femoral neck fracture, traumatic arthritis, and femoral head necrosis. Prosthesis loosening and complications, such as infection, causes post-operative discomfort among patients. Traditional imaging for evaluating the existence of complications has advantages and disadvantages. Thus, single-photon emission computed tomography (SPECT) is combined with spiral CT scanning. Fusing functional imaging and anatomical imaging significantly improves diagnostic accuracy. SPECT imaging has shown its advantage in terms of implant surrounding bone metabolic activity. This technique retains high image quality regardless of the presence of metal prosthesis. Moreover, spiral CT improves anatomical detail display in SPECT imaging. This review explores 3D CT imaging data on hip measurement accuracy, advantages, and methods, as well as SPECT and CT imaging features on the common complications after total hip arthroplasty. These complications include infection around the implant, aseptic loosening tissue reaction, prosthesis peripheral fracture, polyethylene liner wear, heterotopic ossification, and prosthesis pseudotumor formation.