胸部CT平扫诊断贫血程度最佳阈值的初步研究

发布时间：2018-05-21 13:13

本文选题：贫血程度 + CT　；参考：《临床放射学杂志》2017年10期

【摘要】：目的探讨胸部CT平扫诊断贫血程度的价值及准确性。方法测量175例不同程度贫血及非贫血患者的左心室、右心室、室间隔CT值及室隔差值,与36 h内患者外周血Hb水平进行分析,得出CT平扫诊断贫血程度的最佳阈值。结果室隔差值与患者Hb水平相关性最大(决定系数为0.844,P=0.000)。通过ROC曲线分析,得出当室隔差值5.5 HU时,诊断轻度贫血的敏感性为92.9%,特异性较低;当室隔差值取9.5~13.5 HU时,诊断中度贫血的敏感性为95.2%,特异性为68.1%;当室隔差值13.5 HU时,诊断重度贫血的敏感性为87.5%,特异性为73%。结论 CT平扫诊断轻、中、重度贫血的最佳阈值分别为5.5~9.5 HU、9.5~13.5 HU、13.5 HU。
[Abstract]:Objective to evaluate the value and accuracy of chest CT scan in diagnosis of anemia. Methods the CT value of left ventricle, right ventricle, ventricular septum and ventricular septal difference were measured in 175 patients with anemia and non-anemia, and the HB levels in peripheral blood of patients within 36 hours were analyzed. The best threshold value for diagnosis of anemia by CT scan was obtained. Results the difference of ventricular septum had the highest correlation with HB level (determination coefficient was 0.844%). By ROC curve analysis, the sensitivity of diagnosis of mild anemia was 92.9 when the ventricular septal difference was 5.5HU, the specificity was low when the ventricular septal difference was 9.5 Hu, the sensitivity was 95.2 and the specificity was 68.1 when the ventricular septal difference was 9.5 Hu, and when the ventricular septum difference was 13.5 Hu, the sensitivity was 95.2 and the specificity was 68.1 Hu. The sensitivity of diagnosis of severe anemia was 87.5 and the specificity was 73. Conclusion the optimal threshold of CT plain scan for diagnosis of mild, moderate and severe anemia is 5.59.5HU9.5U 13.5 Hu 13.5HU respectively.
【作者单位】：南京医科大学附属江宁医院放射科;南京医科大学附属江宁医院泌尿外科;
【分类号】：R556;R816.3

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