TY - JOUR
T1 - Image reconstruction for rotational modulation collimator (RMC) using non local means (NLM) denoising filter
AU - Park, Sohyeon
AU - Kim, Geehyun
AU - Lee, Gyemin
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/21
Y1 - 2020/2/21
N2 - A rotational modulation collimator (RMC) is an indirect imaging technique for locating remote radiation sources. However, when the counts of detected radiations are low, the RMC generates artifacts in the reconstructed images. To solve this problem, we propose a new reconstruction algorithm. Our algorithm removes noise in an RMC modulation pattern using a variance stabilization transformation and a non-local means filter. We verify that the proposed method enhances the performance of the reconstructed images through experiments with Monte Carlo simulation data.
AB - A rotational modulation collimator (RMC) is an indirect imaging technique for locating remote radiation sources. However, when the counts of detected radiations are low, the RMC generates artifacts in the reconstructed images. To solve this problem, we propose a new reconstruction algorithm. Our algorithm removes noise in an RMC modulation pattern using a variance stabilization transformation and a non-local means filter. We verify that the proposed method enhances the performance of the reconstructed images through experiments with Monte Carlo simulation data.
KW - Image reconstruction
KW - Non-local means
KW - Poisson denoising
KW - Rotating modulation collimator
KW - Variance stabilization
UR - http://www.scopus.com/inward/record.url?scp=85062223197&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2019.02.028
DO - 10.1016/j.nima.2019.02.028
M3 - Review article
AN - SCOPUS:85062223197
SN - 0168-9002
VL - 954
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 161901
ER -