Kappa of interobserver agreement in detection of the relevant lesion.

<p>The error bars delineate the 95% confidence interval. </p

50-year-old female with ulnocarpal impaction syndrome.

<p>Relative overlength of the distal articular surface of the ulna on plain radiograph with localized geographic cystic-sclerotic changes in the medial proximal pole of the lunate and overprojection of TFCC calcification (a), focally increased radiotracer uptake in the carpal region on bone scan (b, arrow), subcortical cyst with rim sclerosis at the proximal ulnar pol of the lunate bone on CT (c, arrow), subcortical cyst displaying tracer accumulation on SPECT/CT fusion image (d, arrow), several subchondral cysts with adjacent alterations of bone marrow signal in the proximal ulnar pol of the lunate bone in PDw SPIR (e, arrow) and T1w image (f, arrow) on MRI. </p

44-year-old female with osteomalacia of the lunate bone.

<p>Relative shortness of the distal articular surface of the ulna on plain radiograph (a), focally increased radiotracer uptake in the carpal region on bone scan (b), slightly hyperdense and coarse trabecular structure of the lunate bone on CT (c), tracer accumulation throughout the lunate bone on SPECT/CT fusion image (d), altered signal of lunate bone marrow in PDw SPIR (e) and T1w image (f) on MRI. Besides, there is also focal tracer accumulation in the ulnar-sided base of the 2^nd metacarpal (d) indicating a “carpal boss”, which was not in the main clinical focus at that time. </p