Abstract
A digital system for chest radiography based on a large image intensifier was compared with a conventional film-screen system. The diagnostic performance was evaluated with special reference to the digital monitor images with a modified version of receiver operating characteristic (ROC) analysis—free response ROC (FROC) analysis—on a chest equivalent phantom. Measurements of spatial resolution and energy imparted were also performed. The detectability of low-contrast objects as well as spatial resolution was better for the full-size film-screen radiographs than for both the digital monitor images and the 100 mm photofluorograms. The image-intensifier system has a potential for considerable dose savings in relation to the conventional technique provided that fluoroscopy is excluded in the positioning of the patients.
Original language | English (US) |
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Pages (from-to) | 337-342 |
Number of pages | 6 |
Journal | Acta Radiologica |
Volume | 30 |
Issue number | 4 |
DOIs | |
State | Published - 1989 |
Externally published | Yes |
Keywords
- Diagnostic radiology, observer performance
- patient exposure
- receiver operating characteristic curve (ROC)
- spatial resolution
- thorax, radiography, digital
ASJC Scopus subject areas
- Radiological and Ultrasound Technology
- Radiology Nuclear Medicine and imaging