【摘要】 目的 评价磁共振成像(MRI)测量股骨头缺血性坏死病灶体积的准确性。方法 25例因股骨头缺血性坏死而行髋关节置换术的患者， 取其CT及MRI图像， 与大体标本剖面进行对比， 用排水测量法计算坏死病灶体积， 再用计算机计算CT、MRI图像上的坏死病灶体积， 进行对比。结果 ①CT和MRI能准确显示坏死区、增生反应区和正常区；②CT、MRI、大体标本所测出的坏死病灶平均体积分别为(20.6±5.1)、(21.3±4.9)、(20.9±5.1)cm3， 比较差异无统计学意义(P>0.05)。结论 MRI能够准确测量病灶体积， 显示病灶形态， 值得信任和推广。

    【关键词】 磁共振成像；股骨头缺血性坏死；病灶体积；病灶形态；影像检查

    【Abstract】 Objective To evaluate accuracy of magnetic resonance imaging (MRI) measurement of lesion volume in avascular necrosis of femoral head. Methods There were 25 patients receiving hip replacement due to avascular necrosis of femoral head. Their CT and MRI images were taken for comparison with gross sample section. Lesion volume was calculated by water-moving method ......