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Social and Behavioral Sciences Commons™
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Full-Text Articles in Social and Behavioral Sciences
Dosimetric Image Reconstruction In Eye Brachytherapy Using Silicon Pixelated Detectors, M Weaver, M Petasecca, M L. F Lerch, D Cutajar, J Jakubek, S Pospisil, Anatoly B. Rosenfeld
Dosimetric Image Reconstruction In Eye Brachytherapy Using Silicon Pixelated Detectors, M Weaver, M Petasecca, M L. F Lerch, D Cutajar, J Jakubek, S Pospisil, Anatoly B. Rosenfeld
Faculty of Health and Behavioural Sciences - Papers (Archive)
This study presents a high spatial resolution dosimetry system for quality assurance of I-125 eye plaques. The system is based on a silicon pixelated detector and is capable of deriving 3D dose distributions. A simple design was implemented, incorporating a movable eye plaque in a small water phantom above the silicon Medipix2 detector. It is designed for obtaining 2D dose distributions at different depths in water, for subsequent 3D dose mapping. The effect of backscattering in a medium placed behind the Medipix2 to simulate surrounding tissue has been studied in terms of dose distribution. Additionally, two modes of acquisition, event …
Fpga Implementation Of A Predictive Vector Quantization Image Compression Algorithm For Image Sensor Applications, Yan Wang, Amine Bermak, Abdesselam Bouzerdoum, Brian W. Ng
Fpga Implementation Of A Predictive Vector Quantization Image Compression Algorithm For Image Sensor Applications, Yan Wang, Amine Bermak, Abdesselam Bouzerdoum, Brian W. Ng
Faculty of Health and Behavioural Sciences - Papers (Archive)
This paper presents a hybrid image compression scheme based on a block based compression algorithm referred to as Vector Quantization (VQ) combined with the Differential Pulse Code Modulation (DPCM) technique. The proposed image compression technique called the PVQ scheme results in enhanced image quality as compared to the standalone VQ. The generated codebooks for the PVQ scheme are more robust for image coding than that of the VQ. This made our system a suitable candidate for developing on chip image sensor with integrated data compression processor. The proposed system was validated through FPGA implementation. The resulting implementation achieved good compression …