Figure 3
From: Hybrid SPECT/CT for the assessment of a painful hip after uncemented total hip arthroplasty
Example of pathological tracer uptake around a loosened stem. 80-year old female patient with THA of the left hip with a diaphyseal locking revision-stem. The patient had a history of several operations after a subtrochanteric femurfracture and complains now of therapy-resistant thigh-pain. A) shows the axial view of the left hip without definite signs of loosening. B)-D) shows pathological tracer uptake at the whole bone-prosthesis interface, consistent with the grading F3,1. The acetabular cup seen in C) shows isolated enhancement in the superior third, which was interpreted as physiological bone remodelling and graded A2 according to our classification. E) shows the anterior and posterior view of planar SPECT images of the pelvis. Intraoperative findings confirmed the diagnosis and the stem was exchanged.