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目的探讨减压性骨坏死在CT,MR I影像中的病灶特征,包括好发部位、病灶性质、分布范围及与X线平片相比的新增部位等。方法对66名潜水工龄超过1年的潜水员进行多部位(双肩、双髋、双膝关节及附近部位)多种影像学方法(X线平片、CT及MR I)检查,并调查潜水史、既往病史和全身体格检查。结果CT,MR I检查减压性骨坏死的病灶检出率明显高于X线检查,差异有统计学意义(P<0.05),病灶形态钙化最多,囊变其次,而X线检查中二者出现较均衡,且致密区多见;CT检查病灶发生部位除X线检查中常见部位外,还有一些新增部位出现,如骨盆、髋臼、髌骨、股骨髓腔等。结论CT,MR I检查减压性骨坏死病灶以钙化和囊变为主要形态特征,能将X线检查中部分致密区表现加以定性;新增部位病灶的临床意义尚待进一步研究。
Objective To investigate the characteristics of focal lesion in CT and MRI images of osteonecrosis of the osteoporosis, including the location of the lesions, the nature of the lesion, the distribution range, and the newly added sites compared with plain radiographs. Methods A total of 66 divers who had been on the diving course for more than one year were examined by multiple imaging methods (X-ray, CT and MRI) at multiple sites (double shoulders, double hips, double knees and nearby sites) Past medical history and physical examination. Results The detection rates of CT and MR I in the patients with decompressive osteonecrosis were significantly higher than those in the X-ray examination (P <0.05), and the lesions were most calcified and cystic changes were followed Appear more balanced, and the more dense area more common; CT examination lesion site in addition to X-ray examination of common parts, there are some new parts appear, such as the pelvis, acetabulum, patella, femoral canal and so on. Conclusions CT and MRI examination of calcification and cystic degeneration are the main morphological features of CT and MR I, which can be used to characterize the performance of partial dense area in X-ray examination. The clinical significance of the new site lesion remains to be further studied.