ABSTRACT
Objective To investigate the value of dual-energy digital subtraction chest radiography in detection of small pulmonarynodules.Methods CT scanning,dual-energy digital subtraction chest radiographs and routine digital chest radiographs were obtainedrespectively from 27 consecutive oncology patients with pulmonary metastasis.The image quality of these two kinds of DR by quality control phantom of Kodak was compared. The images of dual-energy digital subtract radiographs and the routine digital radiography were analysedby two radiologists in biblind method and the detecting rate of pulmonary metastasis by both DR was compared based on the results CTscanning. Results The quality of dual-energy digital subtraction chest radiographs is equal to the routine one except the definition. The detectable rate of pulmonary nodules by dual-energy digital subtraction chest radiographs was 91.2%, by the routine DR was 85.0%. There was significant difference (P