9 March 2017 Novel method to calibrate CT scanners with a conic probe body
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Abstract
A new and simple object for calibrating tomographic scanners has been proposed. Instead of a conventional high-density ball as an object for calibration, we propose a high-density conic body. The cone is advantageous compare to the ball both because of its easy availability (uncomplicated manufacturing) and the straightforward and less error-prone analysis necessary for the identification of a space point (ball’s center vs. cone apex). Applying the conic body instead of a ball as a calibration object enables to reduce calibration errors substantially. Additionally we propose an efficient way to determine the discrepancy between ideal and misaligned positions of the detector that may be crucial for the quality of the reconstruction.
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O. Tischenko, N. Saeednejad, C. Hoeschen, "Novel method to calibrate CT scanners with a conic probe body", Proc. SPIE 10132, Medical Imaging 2017: Physics of Medical Imaging, 101322Q (9 March 2017); doi: 10.1117/12.2254081; https://doi.org/10.1117/12.2254081
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