Strotzer, Michael and Gmeinwieser, Josef K. and Voelk, Markus and Fruend, Rüdiger and Seitz, Johannes and Feuerbach, Stefan (1998) Detection of simulated chest lesions with normal and reduced radiation dose - Comparison of conventional screen-film radiography and a flat-panel x-ray detector based on amorphous silicon. INVESTIGATIVE RADIOLOGY, 33 (2). pp. 98-103. ISSN 0020-9996,
Full text not available from this repository. (Request a copy)Abstract
RATIONALE AND OBJECTIVES. The authors compared a solid-state amorphous silicon (a-Si) detector and screen-film radiography (SFR) with regard to the detection of simulated pulmonary lesions. Evaluation of the impact of a dose reduction of 50% with this digital flat-panel detector was of special interest. METHODS. A self-scanning flat-panel detector, based on a-Si technology with 143 x 143 mu m pixel size, 1 k x 1 k matrix and 12-bit digital output was used. An asymmetric state-of-the-art screen-film system was compared with a-Si images taken at the same dose as SFR-images and at a dose reduced by 50%. An anthropomorphic chest phantom was superimposed by templates containing nodules, linear structures, reticular, and micronodular opacities in a random distribution. Receiver operating characteristic analysis was performed for 23,040 observations made by four independent observers. Student's t test (95% confidence-level) was used for statistical analysis. RESULTS. Receiver operating characteristic analysis showed that a-Si images taken at the same dose as SFR-images were significantly superior to SFR with respect to the detectability of lines (P = 0.01) and micronodular opacities (P < 0.01). For the other objects and the a-Si images taken at a reduced dose, it yielded no statistically significant differences between both imaging modalities. CONCLUSIONS. The results of this phantom study indicate that a-Si detector technology holds promise in terms of dose reduction in chest radiography without loss of diagnostic accuracy compared with SFR.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INTERSTITIAL PULMONARY-DISEASE; DIGITAL RADIOGRAPHY; SELENIUM DETECTOR; OBSERVER PERFORMANCE; STORAGE PHOSPHOR; SYSTEM; ROC; radiography, digital; amorphous silicon; receiver operating characteristic curve |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Röntgendiagnostik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Oct 2023 06:49 |
| Last Modified: | 24 Oct 2023 06:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50110 |
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