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Analytical modeling and feasibility study of a multi-GPU cloud-based server (MGCS) framework for non-voxel-based dose calculations

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International Journal of Computer Assisted Radiology and Surgery Aims and scope Submit manuscript

Abstract

Purpose

In this paper, a multi-GPU cloud-based server (MGCS) framework is presented for dose calculations, exploring the feasibility of remote computing power for parallelization and acceleration of computationally and time intensive radiotherapy tasks in moving toward online adaptive therapies.

Methods

An analytical model was developed to estimate theoretical MGCS performance acceleration and intelligently determine workload distribution. Numerical studies were performed with a computing setup of 14 GPUs distributed over 4 servers interconnected by a 1 Gigabits per second (Gbps) network. Inter-process communication methods were optimized to facilitate resource distribution and minimize data transfers over the server interconnect.

Results

The analytically predicted computation time predicted matched experimentally observations within 1–5 %. MGCS performance approached a theoretical limit of acceleration proportional to the number of GPUs utilized when computational tasks far outweighed memory operations. The MGCS implementation reproduced ground-truth dose computations with negligible differences, by distributing the work among several processes and implemented optimization strategies.

Conclusions

The results showed that a cloud-based computation engine was a feasible solution for enabling clinics to make use of fast dose calculations for advanced treatment planning and adaptive radiotherapy. The cloud-based system was able to exceed the performance of a local machine even for optimized calculations, and provided significant acceleration for computationally intensive tasks. Such a framework can provide access to advanced technology and computational methods to many clinics, providing an avenue for standardization across institutions without the requirements of purchasing, maintaining, and continually updating hardware.

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Acknowledgments

This work was funded in part by Varian and The National Science Foundation.

Funding The funding for this study consisted of contributions by Varian, the National Science Foundation (1200579), and the Ken & Wendy Ruby Foundation award.

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Authors and Affiliations

  1. Department of Radiation Oncology, University of California Los Angeles, 200 Medical Plaza, #B265, Los Angeles, CA, 90095, USA

    J. Neylon, Y. Min, P. Kupelian, D. A. Low & A. Santhanam

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  1. J. Neylon
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  2. Y. Min
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  3. P. Kupelian
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  4. D. A. Low
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  5. A. Santhanam
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Correspondence to J. Neylon.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Neylon, J., Min, Y., Kupelian, P. et al. Analytical modeling and feasibility study of a multi-GPU cloud-based server (MGCS) framework for non-voxel-based dose calculations. Int J CARS 12, 669–680 (2017). https://doi.org/10.1007/s11548-016-1473-5

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  • DOI: https://doi.org/10.1007/s11548-016-1473-5

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