GPU acceleration of compton reconstruction for the PEDRO

Matthew Richard Dimmock, Dmitri Nikulin, Jeremy Michael Cooney Brown, Chuong Vinh Nguyen, John Gillam

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

1 Citation (Scopus)


Compton reconstruction requires the computationally intensive, yet highly parallelizable, task of Cone of Response (CoR) back-projection. The acceleration of CoR back-projection is of significant importance as a faster algorithm allows the user to increase either the size or resolution of the imaging volume. Such acceleration also lends itself to the realization of real-time reconstruction. The image estimate is formed by calculating and histogramming voxel-cone intersections in the imaging volume. As the level of computation increases with the cube of the length or resolution of the volume, the bottle-neck in processing the dataset is at the imaging-voxel level, as opposed to the event level. The reconstruction algorithm developed for the Pixelated Emission Detector for RadiOisotopes (PEDRO) system was optimized for threading at the voxel level and implemented in the C++ programming language. The benchmark C++ code was then extended with OpenCL to assess the acceleration that could be obtained by running the algorithm on a selection of commercially available Graphical Processing Units (GPUs). Increases of up to 102 times the bench-mark speed were achieved
Original languageEnglish
Title of host publication2010 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)
Place of PublicationUSA
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISBN (Print)978-1-4244-9105-6
Publication statusPublished - 2010
EventIEEE Nuclear Science Symposium and Medical Imaging Conference 2010 - Knoxville, United States of America
Duration: 30 Oct 20106 Nov 2010

Publication series

NameIEEE Nuclear Science Symposium Conference Record
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISSN (Print)1082-3654


ConferenceIEEE Nuclear Science Symposium and Medical Imaging Conference 2010
Abbreviated titleNSS/MIC 2010
Country/TerritoryUnited States of America
Other2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010

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