骨髓转换及骨髓病变MR-强永乾浅析.ppt

骨髓病变MR 骨髓逆转换 骨髓逆转换（黄骨髓-红骨髓） 女，21岁，贫血 35岁，男性，地中海贫血，骨髓逆转换 Laurie A,etal.AJNR Am J Neuroradiol 23:248–254,2002 骨髓浸润 51岁，女性，乳腺癌骨转移瘤 50岁，男，肺癌骨转移 多发性骨髓瘤 Fig. 1 Multiple myeloma: multifocal and diffuse patterns. A Coronal T1-weighted spin echo (SE) MR image shows innumerable tiny foci of low signal intensity on a background of fatty marrow. b Coronal T1-weighted SE MR image of a different patient shows diffuse,symmetric, low signal intensity in the marrow of proximal and mid femurs, mimicking the appearance of red marrow. c Coronal fat suppressed T2weighted MR image of the left hip of the same patient as in b reveals diffuse, markedly high signal throughout the marrow, indicating the presence of marrow disease rather than red marrow Skeletal Radiol (2007) 36:1017–1027 淋巴瘤 Fig. 2 Multifocal Hodgkin disease, with false-negative blind marrow biopsy from the posterior ilium. Axial a, b T1-weighted and c, d corresponding fat-suppressed T2-weighted SE MR images show focal tumor deposits in marrow of the right iliac wing and left acetabulum (long arrows). Note linear biopsy tract (short arrows) within normal-appearing marrow of the right posterior ilium; this biopsy yielded a false-negative marrow assessment Skeletal Radiol (2007) 36:1017–1027 淋巴瘤 骨髓水肿 男性，12岁，骨髓炎 骨挫伤 骨髓缺失 70岁，女性，骨质疏松骨髓脂肪变 肿瘤放疗后骨髓改变 Fig. 7 Post-radiation marrow changes in the thoracic spine. Sagittal T1-weighted SE MR image shows diffuse fatty marrow throughout the portion of the thoracic spine that had been included within the radiation therapy port; the most cephalad and caudad vertebrae included in the port are indicated by asterisks. Therapy was directed at spinal metastases (the largest located within the T8 vertebral body) Skeletal Radiol (2007) 36:1017–1027 女性，50岁，宫颈癌放疗后 骨髓纤维化 骨髓梗死 男性，56岁，激素应用3月后，右侧股骨下端及胫骨上端骨梗死。 骨梗死 Fig. 9 Marrow infarcts after chemotherapy for acute lymphoblastic leukemia. a Sagittal T1-weighted SE MR image shows typical serpiginous rims with low signal intensity surrounding regions