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目的探讨DR双能量减影对胸部骨折的诊断价值。方法以124例行胸部DR检查患者临床资料为研究对象，分析DR平片和DR减影片诊断胸部骨折的真实性、可靠性。结果124例患者中的94例患者共确诊骨折116处，DR减影诊断的灵敏性(94.8%)和特异性(96.7%)均明显高于DR平片(72.4%，63.3%)，误诊和漏诊率较低。DR减影图像的正确诊断指数91.5%，符合率85.2%，Kappa系数0.868，都明显高于DR平片。结论 DR双能量减影图像空间分辨率和对比度都较好，能有效分离骨组织和软组织，对胸部骨折诊断的敏感性、特异性都很高，值得临床广泛推广使用。“,”Objective To investigate the diagnostic value evaluation of DR dual energy subtraction shadow on chest fracture. Methods Taking the clinical data of 124 patients underwent chest DR scan as the research object, the diagnostic authenticity and reliability of DR plain film and DR subtraction film on thoracic fracture were evaluated. Results 116 places fractures of 94 patients in 124 patients were diagnosed. Both the sensitivity (94.8%) and specificity (96.7%) of DR subtraction were significantly higher than DR flat (72.4%, 63.3%) with lower misdiagnosis and missed diagnosis rates. The cor ect diagnosis index of DR subtraction images was 91.5%, the coincidence rate was 85.2%, Kappa coef icient was 0.868, which were significantly higher than the DR flat. Conclusion DR dual energy subtraction image exhibits bet er spatial resolution and contrast, which can ef ectively separate the bone and soft tissue of the chest, the diagnosis sensitivity and specificity for fractures are very high, it is worth of clinical popularizing.