热辊可以成为撕裂或扭曲后，在一段时间内造成的图像缺陷。
The heat rollers can become torn or warped after a period of time causing an image defect.
材料与方法 回顾性分析21例肩关节MR造影证实的肩袖全层撕裂的MR图像。
Materials and Methods MRI findings in 21 cases with complete rotator cuff tears, proved with MR arthrography, were retrospectively analyzed.
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