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- W2474848358 abstract "Purpose:The purpose of this project is to build a volumetric scintillation detector for quantitative imaging of 3D dose distributions of proton beams accurately in near real-time.Methods:The liquid scintillator (LS) detector consists of a transparent acrylic tank (20×20×20 cm3) filled with a liquid scintillator that when irradiated with protons generates scintillation light. To track rapid spatial and dose variations in spot scanning proton beams we used three scientific-complementary metal-oxide semiconductor (sCMOS) imagers (2560×2160 pixels). The cameras collect optical signal from three orthogonal projections. To reduce system footprint two mirrors oriented at 45° to the tank surfaces redirect scintillation light to cameras for capturing top and right views. Selection of fixed focal length objective lenses for these cameras was based on their ability to provide large depth of field (DoF) and required field of view (FoV). Multiple cross-hairs imprinted on the tank surfaces allow for image corrections arising from camera perspective and refraction.Results:We determined that by setting sCMOS to 16-bit dynamic range, truncating its FoV (1100×1100 pixels) to image the entire volume of the LS detector, and using 5.6 msec integration time imaging rate can be ramped up to 88 frames per second (fps). 20 mm focal length lens provides a 20 cm imaging DoF and 0.24 mm/pixel resolution. Master-slave camera configuration enable the slaves to initiate image acquisition instantly (within 2 µsec) after receiving a trigger signal. A computer with 128 GB RAM was used for spooling images from the cameras and can sustain a maximum recording time of 2 min per camera at 75 fps.Conclusion:The three sCMOS cameras are capable of high speed imaging. They can therefore be used for quick, high-resolution, and precise mapping of dose distributions from scanned spot proton beams in three dimensions." @default.
- W2474848358 created "2016-07-22" @default.
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- W2474848358 date "2016-06-01" @default.
- W2474848358 modified "2023-09-27" @default.
- W2474848358 title "SU-D-BRC-07: System Design for a 3D Volumetric Scintillation Detector Using SCMOS Cameras" @default.
- W2474848358 doi "https://doi.org/10.1118/1.4955626" @default.
- W2474848358 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28046391" @default.
- W2474848358 hasPublicationYear "2016" @default.
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