Ohkawa M, Tanabe M, Toyama Y, Kimura N, Uematsu K, Satoh G
Department of Radiology, Kagawa Medical University, Japan.
Acta Med Okayama. 1997 Aug;51(4):219-25. doi: 10.18926/AMO/30760.
The findings of three-dimensional computed tomography (3DCT) and two-dimensional computed tomography (2DCT) with helical CT scanning were compared for 21 patients with maxillofacial bone fractures. The results of this study suggest that the 3DCT evaluation can be divided into 3 groups. The first group, in which 3DCT is superior to 2DCT, includes severe complicated midface fractures, for example, tripod fractures and complicated maxillary bone fractures. The second group, in which 3DCT is equal to 2DCT, includes simple fractures, for example, nasal bone fractures and isolated zygomatic fractures. In this group, patients and their families could easily understand the nature of the fracture and clinical course shown by 3DCT as compared with conventional X-ray and 2DCT. The third group, in which 3DCT is inferior to 2DCT, includes blowout fractures. Although 3DCT does not provide additional information is blowout fractures, helical scanning permits clear observation of multiplanar images without artifacts arising from metal prostheses by excluding lower slices during image reconstruction. We conclude that 3DCT provides useful information, especially in regard to the extent of complex fracture lines, as in tripod fractures.
对21例颌面骨骨折患者的三维计算机断层扫描（3DCT）和二维计算机断层扫描（2DCT）与螺旋CT扫描的结果进行了比较。本研究结果表明，3DCT评估可分为3组。第一组，3DCT优于2DCT，包括严重复杂的面中部骨折，例如，三脚架骨折和复杂的上颌骨骨折。第二组，3DCT与2DCT相当，包括简单骨折，例如，鼻骨骨折和孤立的颧骨骨折。在这组中，与传统X线和2DCT相比，患者及其家属能够轻松理解3DCT显示的骨折性质和临床病程。第三组，3DCT不如2DCT，包括爆裂性骨折。尽管3DCT在爆裂性骨折中未提供额外信息，但螺旋扫描通过在图像重建过程中排除下部层面，能够清晰观察多平面图像而无金属假体产生的伪影。我们得出结论，3DCT提供了有用信息，特别是在复杂骨折线范围方面，如三脚架骨折。
