| ZHANG Meng-long,LIU Kai,ZHANG Liang-an.Application value of computed radiography energy subtraction in detecting pulmonary soft-tissue: comparison with direct digital radiography[J].Chinese Journal of Radiological Medicine and Protection,2010,30(4):483-485 |
| Application value of computed radiography energy subtraction in detecting pulmonary soft-tissue: comparison with direct digital radiography |
| Received:September 04, 2009 |
| DOI：10.3760/cma.j.issn.0254-5098.2010.04.032 |
| KeyWords:Energy subtraction Computed radiography(CR) Direct digital radiography(DR) Comparative study |
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| Abstract:: |
| 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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