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- W2088897394 abstract "A vital role in the quality control of radiotherapy is the use of portal imaging for verifying field size, shape, orientation and patient set-up, Coincidence of treated volume and target volume is imperative. Electronic portal imaging devices are effective at providing this verification, However, these devices are versatile enough to be used in other ways pertinent to the delivery of high quality, high precision radiotherapy, This paper examines two such ways: in assessing the reproducibility of a multileaf collimator system, and in determining exit doses in vivo. Configured as a dosemeter, the system shows a linear response with good dynamic range, Its high spatial resolution was used to show that leaf positioning was reproducible to within 0,5 mm for all tested gantry and collimator angles. Our preliminary results from this exit dosimetry technique demonstrate that, under specific conditions, doses can be determined to within 2,5% of that measured using silicon diodes or ion chambers." @default.
- W2088897394 created "2016-06-24" @default.
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- W2088897394 date "1993-11-01" @default.
- W2088897394 modified "2023-09-28" @default.
- W2088897394 title "Measurement possibilities using an electronic portal imaging device" @default.
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- W2088897394 doi "https://doi.org/10.1016/0167-8140(93)90253-5" @default.
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