TY - GEN
T1 - Design of a Rotational Modulation Collimator Utilizing Asymmetric Masks for the Gamma-Ray/Neutron Dual Imaging Technique
AU - Kim, Hyun Suk
AU - Lee, Gyemin
AU - Ye, Sung Joon
AU - Kim, Geehyun
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2017/10/16
Y1 - 2017/10/16
N2 - We are currently developing a dual-particle imager based on the rotational modulation collimator (RMC) technique employing Cs2LiYCl6:Ce (CLYC) detector. A symmetric mask design has been conventionally used for RMC, however, it has an intrinsic problem of not being able to distinguish two symmetric sources located with respect to the rotation axis. In the present study, we propose a new design of collimator masks to solve the artifact problem in the source location estimation imposed by the symmetric pattern of collimator masks. We used the Monte Carlo N-Particle 6.1 (MCNP6) code to obtain modulation patterns, and we applied the maximum likelihood expectation maximization (MLEM) algorithm to reconstruct radiation images from the modulation patterns. The asymmetric mask design we proposed in this paper showed enhanced performance in image reconstruction by removing intrinsic artifacts from the symmetric mask design and will be used as a fundamental design for the future development of the dual-particle RMC system.
AB - We are currently developing a dual-particle imager based on the rotational modulation collimator (RMC) technique employing Cs2LiYCl6:Ce (CLYC) detector. A symmetric mask design has been conventionally used for RMC, however, it has an intrinsic problem of not being able to distinguish two symmetric sources located with respect to the rotation axis. In the present study, we propose a new design of collimator masks to solve the artifact problem in the source location estimation imposed by the symmetric pattern of collimator masks. We used the Monte Carlo N-Particle 6.1 (MCNP6) code to obtain modulation patterns, and we applied the maximum likelihood expectation maximization (MLEM) algorithm to reconstruct radiation images from the modulation patterns. The asymmetric mask design we proposed in this paper showed enhanced performance in image reconstruction by removing intrinsic artifacts from the symmetric mask design and will be used as a fundamental design for the future development of the dual-particle RMC system.
UR - https://www.scopus.com/pages/publications/85041711078
U2 - 10.1109/NSSMIC.2016.8069707
DO - 10.1109/NSSMIC.2016.8069707
M3 - Conference contribution
AN - SCOPUS:85041711078
T3 - 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016
BT - 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016
Y2 - 29 October 2016 through 6 November 2016
ER -