MR images of the articular disk of the TMJ, in a volunteer, used to measure the T2 relaxation time. A, The source MR image of the articular disk. The ROIs used for the measurement of the T2 relaxation time of the entire articular disk (B), the anterior band of the articular disk (C), and the posterior band of the articular disk (D). The T2 relaxation times on a color map ranging from 0 to 100 ms (E) and 25 to 75 ms (F).