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Comparing Image Quality of Flat-Panel Chest Radiography with Storage Phosphor Radiography and Film-Screen Radiography

¹ All authors: Department of Diagnostic Radiology, Ruprecht-Karls-University of Heidelberg, Radiological University Hospital, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany.

View larger version (136K): [in a new window]   Fig. 1A. —Posteroanterior flat-panel chest radiographs of 62-year-old man. Ten anatomic structures (circles and ovals) were evaluated to assess image quality. Structures 1–5 are found in lung parenchyma: right main bronchus, left main bronchus, peripheral bronchi, apical lung vessels, and basal peripheral lung vessels.

View larger version (135K): [in a new window]   Fig. 1B. —Posteroanterior flat-panel chest radiographs of 62-year-old man. Ten anatomic structures (circles and ovals) were evaluated to assess image quality. Structures 6–10 are retrocardiac: lung vessels, right pulmonary artery, descending aorta, left paravertebral diaphragm, and pedicles of vertebral arch.

View larger version (17K): [in a new window]   Fig. 2. —Bar graph shows visibility of anatomic structures 1–5. Note that data are mean scores for image quality evaluated using 5-point scale (1 = unsatisfactory, 2 = poor, 3 = fair, 4 = good, 5 = excellent). Asterisks show significant differences between flat-panel (white bars) and storage phosphor (black bars) systems as well as differences between flat-panel and film-screen (gray bars) systems.

View larger version (17K): [in a new window]   Fig. 3. —Bar graph shows visibility of anatomic structures 6–10. Note that data are mean scores for image quality evaluated using 5-point scale (1 = unsatisfactory, 2 = poor, 3 = fair, 4 = good, 5 = excellent). Asterisks show significant differences between flat-panel (white bars) and storage phosphor (black bars) systems as well as differences between flat-panel and film-screen systems (gray bars).

View larger version (142K): [in a new window]   Fig. 4A. —Posteroanterior chest radiographs of 61-year-old man. Flat-panel radiograph allows better visualization of small lung structures (arrows) than storage phosphor radiograph (B) and conventional film-screen radiograph (C).

View larger version (147K): [in a new window]   Fig. 4B. —Posteroanterior chest radiographs of 61-year-old man. Storage phosphor radiograph allows better visualization of retrocardiac structures (e.g., descending aorta) (arrows) than flat-panel radiograph (A) and conventional film-screen radiograph (C).

View larger version (127K): [in a new window]   Fig. 4C. —Posteroanterior chest radiographs of 61-year-old man. Conventional film-screen radiograph shows limited dynamic range.

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