Dynamic chest radiographs could be obtained in a screening examination using a dynamic flat-panel detector. The dynamic images will provides not only conventional anatomical information but also respiratory kinetic information easily and cost-efficiently. The purpose of this study is to develop the method of quantitative analysis for respiratory kinetics on dynamic chest radiographs. We obtained the dynamic images of six healthy volunteers during respiration using the dynamic flat-panel detector. Our computerized method quantified the movement of diaphragm and lung markings, and the change of density in local area on these images. The results suggest that this computerized method may aid radiologist for the evaluation of lung diseases in a screening examination.
