A simple phantom study of the effects of dose reduction (by kVp increment) below current dose levels on CR chest image quality (original) (raw)
Purpose: To assess the applicability of a simple commercial chest phantom incorporating a quasi anthropomorphic insert, in image quality and dose optimisation studies in computed radiography (CR). Methods: Lung and mediastinal lesions simulated with gelatine were positioned on the chest phantom and exposures made at the current chest radiography dose, set as D ref in the study. Further exposures were made at doses below D ref to study the effect of reducing patient dose below current dose levels, on the clarity and detectability of lung lesions in computed radiography. Lesion detectability and clarity was assessed by four observers using a commercial image viewing software without image manipulation, and a local image viewing software that allowed image contrast enhancement. The possibility of extending dose reduction below current dose levels (D ref ) was assessed for both unmanipulated and manipulated images, from comparison of doses that produced statistically significant differences in image quality from D ref .
Sign up for access to the world's latest research.
checkGet notified about relevant papers
checkSave papers to use in your research
checkJoin the discussion with peers
checkTrack your impact
Loading Preview
Sorry, preview is currently unavailable. You can download the paper by clicking the button above.