UMImaging: A Software Package for Image Reconstruction From 3D-Position-Sensitive Gamma-Ray Detectors

In order to support analysis of data from 3D-position-sensitive gamma-ray detectors, a software package, UMImaging, has been designed and implemented. UMImaging is designed to apply to a wide range of hardware configurations and analysis needs. Its framework centers around reconstruction methods that perform analysis including spectroscopy, imaging, and detection. These methods are supported by classes that supply events, describe geometry, set options, store and manipulate results, and interact with the user. The ability to bin and display highly multidimensional data is presented, drawing numerous examples from the analysis of data from a CdZnTe array system. Parallel computing integrated into the structure of UMImaging is shown to provide almost a seven-fold speedup on a six-core computer with hyper-threading, and the parallel implementation of iterative reconstruction is described. Design choices that make UMImaging platform independent and easily extendable are also discussed.

[1]  Yanfeng Du,et al.  GE intelligent personal radiation locator system , 2009, Defense + Commercial Sensing.

[2]  Feng Zhang,et al.  4-pi Compton imaging with single 3D position-sensitive CdZnTe detector , 2004, SPIE Optics + Photonics.

[3]  Robert Andritschke,et al.  MEGAlib – The Medium Energy Gamma-ray Astronomy Library , 2006 .

[4]  K. Vetter,et al.  High-sensitivity Compton imaging with position-sensitive Si and Ge detectors , 2006 .

[5]  Zhong He,et al.  Gamma-ray energy-imaging integrated spectral deconvolution , 2007 .

[6]  Zhong He,et al.  Gamma-Ray Point-Source Detection in Unknown Background Using 3D-Position-Sensitive Semiconductor Detectors , 2011, IEEE Transactions on Nuclear Science.

[7]  L. Dagum,et al.  OpenMP: an industry standard API for shared-memory programming , 1998 .

[8]  Jeffrey A. Fessler,et al.  Sparsity regularization for image reconstruction with Poisson data , 2009, Electronic Imaging.

[9]  James D. Kurfess,et al.  Compton imager for detection of special nuclear material , 2007 .

[10]  Jeffrey A. Fessler,et al.  Model-Based Reconstruction of Spectral and Spatial Source Distribution for Objects With Known Motion , 2010, IEEE Transactions on Nuclear Science.

[11]  Feng Zhang,et al.  A Prototype Three-Dimensional Position Sensitive CdZnTe Detector Array , 2007, IEEE Transactions on Nuclear Science.

[12]  A. Curioni,et al.  Compton Imaging of MeV Gamma-Rays with the Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT) , 2008, 0805.0290.

[13]  M. Amman,et al.  Status of MEGAlib's real-time analysis tool Realta , 2011, 2011 IEEE Nuclear Science Symposium Conference Record.

[14]  C.E. Seifert,et al.  Directionality in the GammaTracker Handheld Radioisotope Identifier , 2009, IEEE Transactions on Nuclear Science.