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Annals of Nuclear Medicine

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01-01-2012 | Technical note

Fast Monte Carlo-simulator with full collimator and detector response modelling for SPECT

Authors: Antti O. Sohlberg, Markus T. Kajaste

Published in: Annals of Nuclear Medicine | Issue 1/2012

Abstract

Objective

Monte Carlo (MC)-simulations have proved to be a valuable tool in studying SPECT-reconstruction algorithms. Despite their popularity, the use of Monte Carlo-simulations is still often limited by their large computation demand. This is especially true in situations where full collimator and detector modelling with septal penetration, scatter and X-ray fluorescence needs to be included. This paper presents a rapid and simple MC-simulator, which can effectively reduce the computation times.

Methods

The simulator was built on the convolution-based forced detection principle, which can markedly lower the number of simulated photons. Full collimator and detector response look-up tables are pre-simulated and then later used in the actual MC-simulations to model the system response. The developed simulator was validated by comparing it against ¹²³I point source measurements made with a clinical gamma camera system and against ^99mTc software phantom simulations made with the SIMIND MC-package.

Results

The results showed good agreement between the new simulator, measurements and the SIMIND-package. The new simulator provided near noise-free projection data in approximately 1.5 min per projection with ^99mTc, which was less than one-tenth of SIMIND’s time.

Conclusion

The developed MC-simulator can markedly decrease the simulation time without sacrificing image quality.

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Title: Fast Monte Carlo-simulator with full collimator and detector response modelling for SPECT
Authors: Antti O. Sohlberg
Markus T. Kajaste
Publication date: 01-01-2012
Publisher: Springer Japan
Published in: Annals of Nuclear Medicine / Issue 1/2012
Print ISSN: 0914-7187
Electronic ISSN: 1864-6433
DOI: https://doi.org/10.1007/s12149-011-0550-7

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Fast Monte Carlo-simulator with full collimator and detector response modelling for SPECT

Abstract

Objective

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objective

Methods

Results

Conclusion

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