Medizinische Universität Graz - Research portal
Selected Publication:
Eisenhuber, E; Stadler, A; Prokop, M; Fuchsjager, M; Weber, M; Schaefer-Prokop, C.
Detection of monitoring materials on bedside chest radiographs with the most recent generation of storage phosphor plates: Dose increase does not improve detection performance
Radiology. 2003; 227(1):216-221
Doi: 10.1148/radiol.2271020045
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- Co-authors Med Uni Graz
- Fuchsjäger Michael
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- Abstract:
- PURPOSE: To evaluate the performance of the most recent generation of storage phosphor plates for the detection of low-contrast catheter material on bedside chest radiographs. MATERIALS AND METHODS: In 10 patients in the intensive care unit, bedside chest radiographs were obtained with a 400-speed conventional screen-film system and with storage phosphor plates with exposure levels comparable to a 200-, 400-, or 800-speed conventional system. The chest radiograph was divided into 20 regions, 60% of which were superimposed with low-contrast catheter fragments. Six observers independently assessed the presence of catheter fragments by using a receiver operating characteristic (ROC) methodology. RESULTS: Detection performance (mean area under the ROC curve [Az]) with the storage phosphor plates was significantly superior to that with the screen-film system (Az = 0.76) at all three dose levels (Az = 0.88, 0.87, and 0.83 for 200-, 400-, and 800-speed doses, respectively; P <.05). Increasing the dose to a 200-speed system did not significantly increase detection performance compared with that with the 400-speed digital radiographs (Az = 0.88 vs 0.87). Dose reduction to 800 speed significantly deteriorated the detection performance (Az = 0.83) compared with that with the 400- and 200-speed digital radiographs, respectively. CONCLUSION: The most recent generation of storage phosphor plates is superior to a 400-speed screen-film system for the detection of catheter material, even at an exposure level of 800 speed.
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- Find related publications in this database (Keywords)
- radiography, bedside
- radiography, comparative studies
- radiography, storage phosphor
- receiver operating characteristic (ROC) curve
- thorax, radiography