OBJECTIVE To evaluate the clinical value of enhanced magnetic resonance imaging(MRI)in diagnosis of infections after spine surgery so as to improve the accuracy of diagnosis of infections.METHODS From Feb 2013to Jan 2014,totally 37patients with postoperative infections who underwent the spine surgery were enrolled in the study and divided into the unenhanced group with 18cases and the enhanced group with 19cases,then the plain scan group received the plain MIR scan,while the enhanced group received the enhanced MIR scan,the effects of the scans on lesions were observed and compared between the two groups,and the accuracy of diagnosis was compared between the two groups.RESULTS The display rate of discitis was 16.67%in the plain scan group,significantly lower than 36.84%in the enhanced group;the display rate of spine osteomyelitis was 11.11%in the plain scan group,significantly lower than 26.32%in the enhanced group;the display rate of abscess outside the inner membrance was 27.78%in the plain scan group,significantly lower than 15.79%in the enhanced group;the display rate of soft tissue infections was 22.22%in the plain scan group,significantly lower than 10.53%in the enhanced group,the differences were significant(P0.05).The result of the statistical analysis showed that the specificity,sensitivity,and accuracy of the enhanced group were significantly better than those of the plain scan group(P0.05).CONCLUSIONS The enhanced MRI scan can effectively improve the accuracy,sensitivity,and specificity of MRI and overcome the problems in early diagnosis of infections;it has significant clinical value and is worthy to be promoted.

目的：对比320层CT血管造影（CTA）与数字减影血管造影（DSA）在老年下肢动脉闭塞性病变诊断中的应用效果。方法选取2011年5月至2013年5月在该院行下肢动脉CTA及DSA检查的28例老年下肢动脉闭塞性病变患者，将肾动脉水平以下的单侧下肢动脉和腹主动脉分为15个节段，共840个节段，对比320层CTA与DSA的诊断准确率、特异性、敏感性及显示的节段数。结果在全部的840个节段中，320层CTA诊断的准确率、特异性、敏感性分别为99％、98％、99％，DSA诊断的准确率、特异性、敏感性分别为99％、99％、99％。评估腘动脉以下区的动脉节段时320层CTA和DSA诊断的准确率、特异性、敏感性均98％、99％、100％；评估股动脉-腘动脉区节段时320层CTA诊断的准确率、特异性、敏感性分别为98％、98％、99％，DSA诊断分别为99％、98％、98％；评估主动脉-髂动脉区节段时320层 CTA诊断的准确率、特异性、敏感性分别为97％、98％、98％，DSA诊断分别为98％、98％、97％。另有1例腘动脉以下节段在320层CTA显影不清晰，50个节段在 DSA检查中显示不清晰，无法进行评估。结论320层CTA对老年下肢动脉闭塞性病变的诊断具有较高的准确率、特异性、敏感性，与 DSA 基本一致，且较 DSA能够显示出更多的节段。可作为老年下肢动脉闭塞性病变患者制定介入治疗方案的参考依据。

【Objective】To study applied value of the spinal splicing X-ray plain film in scoliosis. 【Method】 Spine splicing X-ray plain film, including posteroanterior and lateral stand projection, posteroanterior and lateral suspension projection, right and left lateral flexion supine projection, were performed in 95 cases with scoliosis. With use of full spine photography function software and the reference of the anatomical marks and scale, seamless splicing was completed, and the whole spine X-ray plain film was obtained. 【Results】The whole spine splicing X-ray image was clear, and the anatomical form in film was undistorted, and the measured data were integrity and reliable. 【Conclusion】The spinal splicing X-ray plain film can intuitively show the whole spinal anatomical form and side convex parts, and be helpful for judging spinal balance and flexibility, and be valuable for preoperative evaluation and judgement of prognosis of scoliosis.

目的探讨不同年龄老年人腰椎2-4骨质密度的CT值范围.方法测量286例60～80岁老年人腰椎CT值.其中男98例,女1 88例.结果随年龄增长骨密度CT值下降,女性较男性更明显.结论骨质疏松与年龄呈正相关系,不同年龄段的老年人应有其不同的骨密度CT参考值,CT定量测定老年人骨密度在预防老年性骨质疏松性骨折提供了较好的参考.