| 张梦龙,刘凯,张良安.计算机X线摄影能量减影与直接数字摄影对胸部软组织病变检测能力比较[J].中华放射医学与防护杂志,2010,30(4):483-485 |
| 计算机X线摄影能量减影与直接数字摄影对胸部软组织病变检测能力比较 |
| Application value of computed radiography energy subtraction in detecting pulmonary soft-tissue: comparison with direct digital radiography |
| 投稿时间：2009-09-04 |
| DOI：10.3760/cma.j.issn.0254-5098.2010.04.032 |
| 中文关键词: 能量减影 计算机X线摄影(CR) 数字摄影(DR) 对比研究 |
| 英文关键词:Energy subtraction Computed radiography(CR) Direct digital radiography(DR) Comparative study |
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| 中文摘要: |
| 目的 比较计算机X线摄影能量减影技术(ES-CR)与直接数字摄影技术(DR)对肺内软组织信号的探测能力。方法 应用胸部放射学体模和X线摄影统计学体模摄取ES-CR和DR影像,由6位放射科医师用5等级判别法各自独立阅读影像,编写程序对观察结果进行受试者操作特性曲线(ROC)分析。收集28例病理证实小肺癌患者的胸部DR影像和ES-CR影像,由3位放射科医师一起做出诊断,分析其真阳性率的差异性。结果 体模影像的ROC分析,ES-CR和DR的 Az 值分别为0.727和0.827,差异有统计学意义( Z =2.96, P<0.05)。28例小肺癌两成像系统的差异也有统计学意义(χ2=5.14, P<0.05)。结论 用DR诊断的真阳性率要高于ES-CR。ES-CR对胸部软组织信号的检出能力尚不如DR。 |
| 英文摘要: |
| Objective To compare the efficiency of computed radiography energy subtraction (ES-CR) with direct digital radiography (DR) in detecting the pulmonary soft-tissue signals.Methods The adult chest phantom including TRG was imaged by ES-CR and DR separately and was estimated by 6 radiologists with 5-value-differentiation method. ROC was used to analyze the performance of two systems. Images of DR and ES-CR of 28 patients with small lung cancer were diagnosed by 3 radiologists. Results The area under the ROC curves was 0.727 in ES-CR and 0.827 in DR (Z=2.96, P< 0.05). 28 small lung cancer patients were significantly different between two systems (χ2 = 5.14, P<0.05). Conclusions The true positive proportion of DR might be higher than that of ES-CR. ES-CR is inferior to DR in detecting pulmonary soft-tissue signals. |
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