Hamer, Okka W. and Voelk, Markus and Zorger, Niels and Feuerbach, Stefan and Strotzer, Michael (2003) Amorphous silicon, flat-panel, X-ray detector versus storage phosphor-based computed radiography: Contrast-detail phantom study at different tube voltages and detector entrance doses. INVESTIGATIVE RADIOLOGY, 38 (4). pp. 212-220. ISSN 0020-9996
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RATIONALE AND OBJECTIVES. Evaluation of the contrast-detail performance of an active-matrix flat-panel x-ray detector in comparison with a storage phosphor system with special regard to the potential of dose reduction. METHODS. A digital x-ray detector based on cesium iodide (CsI) and amorphous silicon (a-Si) technology was compared with a fifth-generation storage phosphor system. A lucite plate with 36 drilled holes of varying diameters and depths was used as contrast-detail phantom. At 45 kVp, 70 kVp, and 113 kVp, images at 8 different detector entrance doses ranging between 0.3 muGy and 40 muGy were obtained. On soft-copy displays, 3 masked observers evaluated the detectability of each aperture in each image according to a 5-point scale. The mean sum scores of corresponding images were compared. RESULTS. For all tube voltages and detector entrance doses, the images obtained with the CsI/a-Si detector resulted in better observer contrast-detail performance as compared with the images of the storage phosphor system. The CsI/a-Si system allowed a calculated dose reduction of 39% at 45 kVp, 68% at 70 kVp, and 81% at 113 kVp as compared with the storage phosphor system, without loss of contrast-detail detectability. CONCLUSIONS. Under the conditions of the chosen experimental design, the CsI/a-Si system provided a superior contrast-detail performance as compared with the storage phosphor system. The potential of dose reduction increased with rising tube voltage.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCREEN-FILM RADIOGRAPHY; DIGITAL CHEST RADIOGRAPHY; LARGE-AREA; IMAGE QUALITY; TECHNOLOGY; SYSTEM; DETECTABILITY; REDUCTION; LESIONS; PERFORMANCE; flat panel detector; radiography; storage phosphor; radiography; comparative studies; contrast-detail study |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Röntgendiagnostik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Sep 2021 08:18 |
| Last Modified: | 15 Sep 2021 08:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39154 |
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