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MR Imaging with T2*- mapping for improved acetabular cartilage assessment in FAI-a case report with arthroscopic
P Morgan1, S Spiridonov2, R Goebel3
1Department of Orthopaedic Surgery, University of Minnesota, 2512 South 7th Street, Minneapolis, MN, 55454, USA.
Unlabelled:
Articular cartilage assessment in femoroacetabular impingement (FAI) is challenging. Recent studies on T2* relaxation time mapping suggest the technique may be useful in diagnosing cartilage damage. The purpose of this case report is to describe how quantitative T2*-mapping may improve cartilage assessment of the acetabulum in patients with FAI. MR arthrography was performed at 3 Tesla (T) using intra-articular Gadolinium and a T2* mapping protocol. Data from the acetabular cartilage was separated from femoral head cartilage data and then superimposed on a flattened, map projection representation of the patient's acetabulum. The areas of unhealthy cartilage observed at the time of arthroscopy - including debonding and delamination - were seen preoperatively at the same anatomic locations as areas of decreased T2* values. T2* mapping values provided a non-invasive assessment of the acetabular articular cartilage. A flattened acetabular map projection allowed for anatomic visualization of areas of unhealthy cartilage.
Level Of Evidence:
Level IV.
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