Kaneda T, Minami M, Ozawa K, Akimoto Y, Utsunomiya T, Yamamoto H, Suzuki H, Sasaki Y
Department of Radiology, Nihon University School of Dentistry at Matsudo, Tokyo, Japan.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1995 May;79(5):634-40. doi: 10.1016/s1079-2104(05)80107-6.
Magnetic resonance imaging of 14 histopathologically confirmed cases of osteomyelitis of the mandible was retrospectively reviewed. The findings of magnetic resonance imaging were compared with conventional radiography, computed tomography, bone scintigraphy, and histopathologic examinations. All lesions in bone marrow were shown as areas of low (64%) or low-to-intermediate (36%) signal intensity on T1-weighted images, and areas of high (29%), mixed (high and low, 21%; high and intermediate, 36%) or low (14%) signal intensity on T2-weighted images. Histopathologically, high T2-weighted signal intensity areas that showed enhancement after contrast injection corresponded to active infection. These were not collections of pus but were predominantly areas of granulation tissue. Magnetic resonance imaging showed larger areas of abnormality than plain radiography or computed tomography. Bone scintigraphy did not accurately reveal the locations of lesions but showed heterogeneous increased uptake in all patients. MRI was an extremely useful technique for assessing osteomyelitis of the mandible.
对14例经组织病理学确诊的下颌骨骨髓炎病例的磁共振成像进行了回顾性研究。将磁共振成像的结果与传统X线摄影、计算机断层扫描、骨闪烁显像及组织病理学检查结果进行了比较。骨髓内所有病变在T1加权像上均表现为低信号区（64%）或低至中等信号区（36%），在T2加权像上表现为高信号区（29%）、混合信号区（高信号与低信号，21%；高信号与中等信号，36%）或低信号区（14%）。组织病理学上，注射对比剂后呈强化的高T2加权信号区对应于活动性感染。这些区域并非脓肿，主要是肉芽组织区。磁共振成像显示的异常区域比普通X线摄影或计算机断层扫描显示的更大。骨闪烁显像不能准确显示病变部位，但所有患者均显示摄取不均匀增加。磁共振成像对于评估下颌骨骨髓炎是一项极其有用的技术。
