Hansson L G, Westesson P L, Eriksson L
Department of Radiology, University Hospital of Lund, Sweden.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1996 Dec;82(6):698-703. doi: 10.1016/s1079-2104(96)80446-x.
The purpose of this study was to compare midfield (0.3 Tesla) magnetic resonance imaging with conventional tomography for assessment of osseous changes of the temporomandibular joint. The material consisted of magnetic resonance images and tomograms of 66 temporomandibular joints. Each set of images was assessed for osseous changes without knowledge about patient symptoms or findings of the other imaging modality. The results showed that 30 joints were normal both by magnetic resonance imaging and tomography, 21 joints showed osseous changes with both techniques, and there were discrepancies between the two techniques in 15 joints. In 12 of these 15 joints magnetic resonance imaging was negative, but tomography showed osseous changes. In the other three joints tomography was normal, but magnetic resonance imaging showed osseous changes. Based on previous tomographic and midfield magnetic resonance imaging studies with correlation to cryosections and dissection and the quality of the depiction of the osseous changes in these images, it was apparent that tomography represented a more accurate representation of the osseous anatomy. The results therefore suggest that conventional tomography is superior to midfield magnetic resonance imaging for assessment of osseous changes of the temporomandibular joint.
本研究的目的是比较中场（0.3特斯拉）磁共振成像与传统断层扫描在评估颞下颌关节骨质变化方面的差异。研究材料包括66个颞下颌关节的磁共振图像和断层扫描图像。在不了解患者症状或其他成像方式检查结果的情况下，对每组图像进行骨质变化评估。结果显示，30个关节在磁共振成像和断层扫描中均显示正常，21个关节在两种技术下均显示骨质变化，15个关节在两种技术检查结果上存在差异。在这15个关节中的12个关节中，磁共振成像显示为阴性，但断层扫描显示有骨质变化。在另外三个关节中，断层扫描显示正常，但磁共振成像显示有骨质变化。基于以往与冷冻切片和解剖相关的断层扫描和中场磁共振成像研究以及这些图像中骨质变化的描绘质量，很明显断层扫描能更准确地呈现骨质解剖结构。因此，结果表明传统断层扫描在评估颞下颌关节骨质变化方面优于中场磁共振成像。
