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• W2765577812 abstract "Modern oncology and neurosurgery treatments often use stereotactic radiosurgery. Using linear accelerators and appropriate collimators, treatments of predefined high localized radiation doses can be concentrated in small volumes inside the patient. This can be used to treat tumors in otherwise difficult reachable zones of the patient, such as inside the head. In order to avoid unnecessary damage to surrounding healthy tissue, the treatment volume must be positioned as accurate as possible. The Winston-Lutz test is a standard test that is used in quality control procedures to verify the correct alignment of CT scan images with respect to the isocenter of the radiation equipment. The Winston-Lutz test uses a metal Tungsten ball positioned at the isocenter of the linear accelerator to calibrate the system under various positions of the gantry and various angles of the collimator in the gantry head and patient table. In current procedures, the calibration images that are captured during the test are manually interpreted, measured on workstation screens by the medical personnel. This paper presents new automatic methods to accurately determine the center of the metal ball, based on the image center of gravity as well as the automatic detection of the center of a square radiation field around the ball. The calibration results obtained from the automatic image processing based calculations are consistent and precise with a mean difference of 0.17 mm and a standard deviation of 0.15 mm." @default.
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• W2765577812 date "2017-10-01" @default.
• W2765577812 modified "2023-09-26" @default.
• W2765577812 title "Automated winston-lutz test for efficient quality control in stereotactic radiosurgery" @default.
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• W2765577812 doi "https://doi.org/10.1109/cisp-bmei.2017.8302297" @default.
• W2765577812 hasPublicationYear "2017" @default.
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