Amano Y, Kumazaki T, Amano M
Department of Radiology, Nippon Medical School.
Nihon Igaku Hoshasen Gakkai Zasshi. 1996 Jul;56(8):546-9.
We observed 125 lumbar vertebrae in 25 patients with aplastic anemia using a 0.5-T MR imager. Bone marrow patterns of aplastic anemia on STIR images were classified into five types: 1) homogeneously low intensity fatty marrow, 2) fatty marrow with scattered hematopoietic nodules, 3) fatty marrow with marginal hematopoietic regions, 4) fatty marrow surrounded by bandlike hematopoietic regions, and 5) homogeneously high-signal-intensity hematopoietic marrow. STIR images defined the fatty marrow as a markedly hypointense region and the hematopoietic marrow as a high signal intense area. Many cases included the homogeneously fatty marrow and fatty marrow with marginal hematopoietic areas, whereas marrow with a broad range of hematopoiesis was detected in patients younger than 40 years. MR images also demonstrated that fatty marrow could shift to hematopoietic marrow following therapy. MR images were useful for detection of the bone marrow distribution of aplastic anemia, related to aging and treatment.
我们使用一台0.5-T磁共振成像仪对25例再生障碍性贫血患者的125个腰椎椎体进行了观察。短TI反转恢复（STIR）图像上再生障碍性贫血的骨髓模式分为五种类型：1）均匀低信号强度的脂肪骨髓；2）有散在造血结节的脂肪骨髓；3）有边缘造血区域的脂肪骨髓；4）被带状造血区域包围的脂肪骨髓；5）均匀高信号强度的造血骨髓。STIR图像将脂肪骨髓定义为明显低信号区域，将造血骨髓定义为高信号区域。许多病例包括均匀脂肪骨髓和有边缘造血区域的脂肪骨髓，而在40岁以下患者中检测到有广泛造血的骨髓。磁共振图像还显示，治疗后脂肪骨髓可转变为造血骨髓。磁共振图像有助于检测与年龄和治疗相关的再生障碍性贫血的骨髓分布情况。
