Imaging of Hip Arthroplasty

Abstract

Imaging studies are central to the evaluation of persistent or recurrent symptoms after hip arthroplasty. The evaluation starts with radiographs and may be followed by arthrography, aspiration, scintigraphy, sonography, computed tomography, and MR imaging. Common etiologies of a painful or dysfunctional hip arthroplasty are mechanical loosening, polyethylene wear?induced osteolysis, adverse local tissue reaction to metal wear products, infection, fractures, heterotopic ossification, tendinopathy, and nerve injury. MR imaging with optimized protocols and dedicated techniques for metal artifact reduction is the most comprehensive imaging modality. In this article, we discuss and illustrate the imaging appearances of these conditions with a focus on the MR imaging evaluation.

Treatment of Periprosthetic Femoral Fractures Vancouver Type B2: Revision Arthroplasty Versus Open Reduction and Internal Fixation With Locking Compression Plate

“…An initial subsidence of the implant by a few millimeters was assessed as normal, but progression after 2 years or subsidence >5 mm was considered pathological for both uncemented and cemented components. 21,22 A progression of the subsidence and persisting pain was defined as clinically relevant subsidence.…”

Advances in MRI around metal

“…MAVRIC has been shown to be more sensitive than standard TSE sequences for determining the volume of osteonecrosis of the femoral head in patients with instrumentations for femoral neck fractures . But most reports on the utility of MARS imaging are on hip prostheses, since total hip arthroplasty (THA) is the most commonly performed prosthesis implantation . MSI imaging has been shown to be clinically relevant for imaging of THA: Almost half of the abnormal imaging findings were missed on STIR‐high bandwidth sequences compared with STIR‐SEMAC images, while T 1 ‐high bandwidth imaging was similar to T 1 ‐SEMAC imaging .…”

A Large Rice Body-Containing Cyst Mimicking Infection following Total Hip Arthroplasty: A Case Report

“…This eventuality was never reported in differential diagnosis of hip periprosthetic soft tissue masses before [7–10]. Therefore, our case report, together with the previous case published in 2012, is adamant in widening the array of the differential diagnosis in patients presenting with a slow growing soft tissue mass following total hip arthroplasty, making rice-like bodies cyst a valid one to consider.…”