Hybrid MPI+OpenMP parallelization of image reconstruction in proton beam therapy on multi-core and many-core processors

James Della Giustina, Carlos Barajas, Matthias K. Gobbert, Dennis S. Mackin, Jerimy Polf

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

Abstract

The advantage of proton beam therapy is that the lethal dose of radiation is delivered by a sharp increase toward the end of the beam range, known as the Bragg peak (BP), with no dose delivered beyond. By using these characteristics of the BP, radiation dose to the tumor can be maximized, with greatly reduced radiation dose to the surrounding healthy tissue. If the secondary gamma rays that are emitted through interaction of the protons in the beam with atoms in the patient tissue could be imaged in (near) realtime during beam delivery, it could provide a means of visualizing the delivery of dose for verification of proper treatment delivery. However, such imaging requires very fast image reconstruction to be feasible. This project focuses on measuring the performance of a new parallel version of the CCI (Compton camera imaging) image reconstruction algorithm. We show two conclusions: (i) The new hybrid MPI+OpenMP parallelization of the code on the many-core Intel Xeon Phi KNL processor with 68 computational cores makes fast reconstruction times possible and thus enables the use of CCI in real time during treatment. (ii) A compute node with two of the latest multi-core Intel Skylake CPUs with 24 cores performs even better in a first comparison of both types of processors available on Stampede2 at the Texas Advanced Computing Center (TACC).

Original languageEnglish (US)
Title of host publicationSimulation Series
EditorsLayne T. Watson, Masha Sosonkina, Karl Rupp, William I. Thacker, Josef Weinbub
PublisherThe Society for Modeling and Simulation International
Pages118-128
Number of pages11
Edition4
ISBN (Electronic)9781510860162
ISBN (Print)9781510860131, 9781510860148, 9781510860155, 9781510860162, 9781510860179, 9781510860186, 9781510860186, 9781510860209
StatePublished - 2018
Event26th High Performance Computing Symposium, HPC 2018, Part of the 2018 Spring Simulation Multi-Conference, SpringSim 2018 - Baltimore, United States
Duration: Apr 15 2018Apr 18 2018

Publication series

NameSimulation Series
Number4
Volume50
ISSN (Print)0735-9276

Other

Other26th High Performance Computing Symposium, HPC 2018, Part of the 2018 Spring Simulation Multi-Conference, SpringSim 2018
Country/TerritoryUnited States
CityBaltimore
Period4/15/184/18/18

Keywords

  • CCI algorithm
  • Image reconstruction
  • Intel Skylake
  • Intel Xeon Phi
  • Proton beam therapy

ASJC Scopus subject areas

  • Computer Networks and Communications

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