MR imaging of avascular necrosis of carpal bones.

概要

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The usefulness of MRI in carpal avascular necrosis was investigated in 20 cases, 16 in lunates, 3 in scaphoids and 1 in triquetrum, with T1 and T2 weighted images of the spin echo and T2 weighted images of the field echo.<BR>Early diagnosis of carpal bone necrosis was possible when the T1 weighted image showed a moderate low intensity signal. A high intensity signal in the T2 weighted image indicated the onset of revascularization, and a favorable prognosis. A normal signal indicated healing of carpal avascular necrosis.<BR>MRI was found to be very useful in establishing the diagnosis and in determining the prognosis of carpal osteonecrosis.
日本関節病学会の論文