Strotzer, Michael and Voelk, Markus and Fruend, Rüdiger and Hamer, Okka and Zorger, Niels and Feuerbach, Stefan (2002) Routine chest radiography using a flat-panel detector: Image quality at standard detector dose and 33% dose reduction. AMERICAN JOURNAL OF ROENTGENOLOGY, 178 (1). pp. 169-171. ISSN 0361-803X
Full text not available from this repository.Abstract
OBJECTIVE. The purpose of this study was to evaluate the effectiveness of a large-area, flat-panel X-ray detector for performing routine chest radiography at two different detector doses. MATERIALS AND METHODS. The chest radiographs of 50 patients (age range, 16-79 years; mean age, 57 years) were obtained at two different detector dose levels. Digital images were taken from the same patients in posteroanterior-and lateral views with detector doses of 2.5 mu Gy and 1.8 mu Gy, respectively, at 125 kVp tube voltage. The cesium iodide-amorphous silicon active-matrix imager had a panel size of 43 x 43 cm, a matrix of 3000 x 3000, and a pixel pitch of 143 mum. Images were presented in a random order to three independent radiologists who were unaware of the dose level at which the images had been obtained. They subjectively rated image quality on a 4-point scale, according to six criteria (presentation of obscured lung, unobscured lung, airways, mediastinum and hilum, bony thorax, and overall impression). Statistical significance of differences was evaluated with Student's t test for paired samples (confidence level, 95%). RESULTS. Digital radiographs obtained at 2.5 and 1.8 mu Gy were equivalent on all quality criteria. No statistically significant differences and no tendency toward a preference for ima.-es obtained at one or the other dose level were observed. According to the registered mAs values, the average difference in patient dose was 33%. CONCLUSION. Use of flat-panel digital imagers based on the cesium iodide-amorphous silicon technique allows a considerable dose reduction during routine chest radiography without loss of image quality.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCREEN-FILM RADIOGRAPHY; DIGITAL RADIOGRAPHY; AMORPHOUS-SILICON; LARGE-AREA; SYSTEM; TECHNOLOGY; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Röntgendiagnostik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Nov 2021 10:39 |
| Last Modified: | 15 Nov 2021 10:39 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40680 |
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