Amano Y, Wakabayashi H, Kumazaki T
Department of Radiology, Nippon Medical School, Tokyo, Japan.
J Comput Assist Tomogr. 1995 Jul-Aug;19(4):552-4. doi: 10.1097/00004728-199507000-00008.
Signal intensity changes in bone marrow of the mandible were observed in cases with hematologic disorders.
Using MRI, bone marrow intensity of the mandible was observed in six patients with polycythemia vera, acute leukemia, myelofibrosis, and malignant lymphoma. A control group was also evaluated for comparison.
The bone marrow of the condyloid process of the mandible converts to yellow marrow in early childhood. Therefore, T1-weighted imaging showed the marrow of the mandible to have a high signal intensity similar to that of fat in the control cases. In contrast, the bone marrow of the mandible in the patients exhibited lower intensity than that of fat and was enhanced after Gd-DTPA injection.
In hematologic diseases MRI detected the signal changes of the mandible. More attention should be focused on the marrow intensity of the mandible in the routine cranial MR examinations in patients with hematologic disorders.
观察血液系统疾病患者下颌骨骨髓的信号强度变化。
采用磁共振成像（MRI）观察6例真性红细胞增多症、急性白血病、骨髓纤维化及恶性淋巴瘤患者的下颌骨骨髓信号强度。同时评估一个对照组用于比较。
下颌骨髁突的骨髓在儿童早期转变为黄骨髓。因此，在T1加权成像中，下颌骨骨髓显示出与对照组脂肪相似的高信号强度。相比之下，患者下颌骨的骨髓信号强度低于脂肪，并且在注射钆喷酸葡胺（Gd-DTPA）后增强。
在血液系统疾病中，MRI可检测到下颌骨的信号变化。在对血液系统疾病患者进行常规头颅MR检查时，应更多关注下颌骨的骨髓信号强度。
