Abstract
CT arthrography (CTa) and MR arthrography (MRa) are useful tools for the investigation
of intra-articular hip disease. They are minimally invasive techniques with a very
low rate of complications and can be performed safely. CTa or MRa can be performed
after an intra-articular injection of diluted contrast, but both techniques can also
be performed after a single injection. As radiologists we should be able to address
the surgeon's questions and work together to standardize terminology and classifications
systems for accurate reporting. This update emphasizes radiological findings with
a clinical perspective. CTa and MRa allow the precise diagnosis of labral tears, loose
bodies, and intra-articular ligaments (capsular and ligamentum teres). The use of
careful technique and a tailored protocol has improved our ability to detect and describe
cartilage lesions. This is essential because knowledge of the status of the cartilage
may dictate a specific surgical approach, and when cartilage lesions are extensive,
they are a negative prognostic indicator for arthroscopic treatment.
Keywords
hip arthrography - CT arthrography - MR arthrography - labral tear - cartilage - femoroacetabular
impingement
