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Fig. 4A —28-year-old man with chronic right-sided hip pain. A Coronal
fat-suppressed T1-weighted spin-echo sequences (TR/TE, 500/13) were acquired
at 17 minutes (time point [TP] 1) (A), 50 minutes (TP 2) (B),
115 minutes (TP 3) (C), 175 minutes (TP 4) (D), and 217 minutes
(TP 5) (E) after intraarticular administration of Gd-DOTA
(tetraazacyclododecanetetraacetic acid). MR image acquired at TP 1 (A)
shows maximal distension of hip recess (arrow) and maximal sharpness
of labrum, as well as maximal contrast between joint fluid versus labrum and
cartilage. MR image at TP 2 (B) still shows good distension, sharpness,
and contrast (arrow). At TP 3 (C), MR image shows notable loss
of joint distension, sharpness, and contrast between intraarticular structures
(arrow). At TPs 4 (D) and 5 (E), image quality was
rated insufficient for diagnostic purposes because of lack of joint distension
and contrast (arrows).
