Volk, M and Strotzer, M and Gmeinwieser, J and Alexander, J and Frund, R and Seitz, J and Manke, C and Spahn, M and Feuerbach, S (1997) Flat-panel X-ray detector using amorphous silicon technology - Reduced radiation dose for the detection of foreign bodies. INVESTIGATIVE RADIOLOGY, 32 (7). pp. 373-377. ISSN 0020-9996,
Full text not available from this repository.Abstract
RATIONALE AND OBJECTIVES. The authors evaluate a new flat-panel x-ray detector (FD) with respect to foreign body detection and reduction of radiation dose compared with screen-film radiography. METHODS. Flat-panel x-ray detector is based on amorphous silicon technology and uses a 1 k x 1 k photo-detector matrix with a poxel size of 143 x 143 mu m and 12-bit digital output. A thallium-doted cesiu iodide scintillation layer converts x-rays into light. A ex vivo experimental model was used to determine the detectability of foreign bodies. Foreign bodies with varying sizes were examined: glass with and without addition of lead, bone, aluminium, iron, copper, gravel fragments, and graphite. Four hundred observation fields were examined using conventional radiography (speed, 400; system dose: 2.5 mu Gy) as well as FD with a simulated speed of 400, 800, 1200, and 1600, corresponding to a detector dose of 2.5 mu Gy, 1.25 mu Gy, 0.87 mu Gy, and 0.625 mu Gy, respectively. Four independent radiologists performed receiver operating characteristic analysis of 8000 observation. RESULTS. Flat-panel x-ray detector with a simulatio nspeed of 400 was significantly superior (P = 0.012) to screen-film radiography (speed, 400). At a simulated speed of 800 and 1200 FD yielded results equivalent to screen-film radiography. Flat-panel x-ray detector was significantly inferior to screen-film radiography at a simulated speed of 1600 (P = 0.012). CONCLUSIONS. Flat-panel x-ray detector technology allows significant reduction in radiation dose compared with screen-film radiography without loss of diagnostic accuracy.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DIGITAL SKELETAL RADIOGRAPHY; amorphous silicon; digital imaging; foreign bodies |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50715 |
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