CT Arthrography (CTR)

Introductory Comments: Direct MR arthrography (MRR) consists of MR imaging of a joint after injecting dilute gadolinium or straight saline into the joint. Over the last decade, this technique has become widely accepted for imaging numerous intraarticular disorders. Prior to that, CT arthrography (CTR) had been gaining steam as an improvement in imaging some joints over standard contrast arthrography and arthrotomography, in which planar tomograms are performed following standard arthrography. Advances in MRI without contrast, indirect MRR (MRI of a joint after intravenous administration of gadolinium), and ultrasound present additional options for non-surgical diagnosis of joint derangements. With all of these options, it can be difficult to know the best method to image a joint in various clinical scenarios. The purpose of this talk is to present the techniques for CTR, typical indications, strengths and weaknesses of the techniques, and several case examples. This accompanying document will augment the first three items above.