Design modifications to Rotating Modulation Collimators for extended field-of-view

S Barros; G Kim

doi:10.1016/j.apradiso.2021.109597

Design modifications to Rotating Modulation Collimators for extended field-of-view

Appl Radiat Isot. 2021 Apr:170:109597. doi: 10.1016/j.apradiso.2021.109597. Epub 2021 Jan 20.

Authors

S Barros¹, G Kim²

Affiliations

¹ Department of Quantum and Nuclear Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, South Korea.
² Department of Nuclear Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, South Korea. Electronic address: gk.rs@snu.ac.kr.

PMID: 33493792
DOI: 10.1016/j.apradiso.2021.109597

Abstract

Rotating Modulation Collimators (RMC) are devices that can be used to determine the location of a radiation source. In this work, a design with extended field-of-view (FOV) is proposed to allow faster measurements by providing a wider scanned area. Monte Carlo simulations were used to calculate the response of the RMC system, system matrix and modulation profiles. The Maximum Likelihood Expectation Maximization algorithm was used for image reconstruction. The proposed design provides a FOV up to 60° with a maximum error of 5° or up to 70° with a maximum error of 15°.

Keywords: MCNP6; MLEM; Monte Carlo simulations; Radiation imaging; Rotating modulation collimator.