Mr. Vasiliy Obolenskiy Profile

Vasiliy Obolenskiy

at Institute of Microelectronics Technology and High-Purity Materials RAS

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Proceedings Article | 4 January 2021 Paper

Modelling the point source function for collimators employed in radio guided surgery and SPECT

Yana Shabelnikova, Sergey Zaitsev, Vasiliy Obolenskiy

Proceedings Volume 11605, 116050A (2021) https://doi.org/10.1117/12.2587441

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For the multi-channel collimators employed in SPECT measurements and in gamma probes (for radio guided surgery) an approach to modeling the functioning of collimator is developed. This approach involves the calculation of point source function and the sensitivity field for the considering device. The effect of finite absorption in collimator material is taken into account. The results of modelling for confocal collimator are presented. The calculations were performed for the attenuation length corresponding to the device 3D-printed from metal and in the assumption of infinite absorption. It makes possible to estimate quantitatively the effect of gamma photons partial propagation through the matrix of collimator on the sensitivity and resolution for the specified material and the geometry of the device.

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