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http://dx.doi.org/10.5573/ieie.2016.53.9.118

Estimating the Direction and Distance of an Unknown Radiation Source Using RMC  

Shin, Youngjun (Seoul National University of Science and Technology)
Kim, Geehyun (Sejong University)
Lee, Gyemin (Seoul National University of Science and Technology)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.9, 2016 , pp. 118-125 More about this Journal
Abstract
Rotating modulation collimator(RMC) is a remote sensing technique for a radiation source. This paper introduces an RMC system model and its image reconstruction algorithm based on Kowash's research. The reconstructed image can show the direction of a source. However, the distance to the source cannot be recovered. Moreover, the RMC image suffers from $180^{\circ}$ ambiguity. In this paper, we propose a distance estimation method using two RMCs together with a solution to the ambiguity. We also demonstrate its performance using simulated RMC data.
Keywords
Rotating modulation collimator; Maximum likelihood estimation; Image reconstruction; Radiation source detection; Monte Carlo simulation;
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  • Reference
1 K. P. Ziock and K. E. Nelson, "Maximum Detector Sizes Required for Orphan Source Detection", Coden Nimaer, vol. 579, no. 1, pp. 357-362, August 2007.
2 M. Oda, "High-Resolution X-Ray Collimator with Broad Field of View for Astronomical Use", Applied Optics, vol. 4, no. 1, pp. 143, January 1965.   DOI
3 L. Mertz, "A Dilute Image Transform with Application to an X-Ray Star Camera", Symposium on Modern Optics. Polytechnic Institute of Brooklyn, pp. 787-791, New york, America, March 1967.
4 B. R. Kowash, "A Rotating Modulation Imager for Orphan Source Search Problem". Ph. D. Dissertation, University of Michigan, September 2008.
5 F. Knoll, Radiation Detection and Measurement, Fourth edition, Wiley, 2010.
6 Y. Vardi, L. A. Shepp, L. Kaufman, "A Statistical Model for Positron Emission Tomography", Journal of the American Statistical Association, vol. 80. no. 389, pp. 8-20, March 1985.   DOI
7 B. R. Kowash, D. K. Wehe, "A unified nearand far-field imaging model for rotating modulation collimators", Nuclear Instruments and Methods in physics Research A, vol. 637, no. 1, pp. 178-184, May 2011.   DOI
8 X-5 Monte Carlo Team, MCNP Overview and Theory, Los Alamos National Laboratory, 2008.