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Design considerations for direct and indirect active matrix flat-panel portal imagers = Premisleki pri načrtovanju neposrednih in posrednih ravnih prikazovalnikov z aktivno matriko za portalno slikanjeLachaine, Martin ; Fallone, Biagio GinoBackground. Recent advances in thin film transistor (TFT) technology have allowed the construction of active matrix flat-panel imagers (AMFPI) for various medical imaging modalities. Since the design ... of such systems is still in the development stage, it is unclear what detector characteristics are required in order to optimize these detectors for portal imaging. Material andmethods. In this work, we used cascade analysis and Monte Carlo techniques to calculate the DQE for both direct and indirect AMFPIs for portal imaging, and use these calculations to study the optimal detector characteristics. We validate our calculations with existing experimental data. Results. We show that the for ideal flat-panel characteristics the direct and indirect detection methods have the same DQE for a given mass thickness. Conclusions. We generate graphs which may be helpful in the design of future megavoltage AMFPIs.Source: Radiology and oncology. - ISSN 1318-2099 (Vol. 35, no. 1, mar. 2001, str. 63-71)Type of material - article, component partPublish date - 2001Language - englishCOBISS.SI-ID - 12888537
Author
Lachaine, Martin |
Fallone, Biagio Gino
Topics
Radiotherapy dosage |
Instrumentation |
Methods |
Equipment design |
Monte carlo method |
diagnostika |
radiologija
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