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Related Experiment Video

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Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator

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Modeling block detectors in SimSET.

Robert Harrison¹, Steven Gillispie, Ruth Schmitz

¹Radiology, University of Washington, Seattle, Washington.

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine

|December 15, 2010

Summary

This summary is machine-generated.

The Simulation System for Emission Tomography (SimSET) software now includes a flexible block detector model. This enhancement improves simulation accuracy for various positron emission tomography (PET) scanner designs.

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Area of Science:

Medical Imaging
Nuclear Medicine
Computational Science

Background:

The Simulation System for Emission Tomography (SimSET) is a widely used software for simulating positron emission tomography (PET) scanners.
Previous versions of SimSET had limitations in accurately modeling diverse detector geometries.

Purpose of the Study:

To introduce and validate a new block detector model in SimSET software version 2.9.
To enhance the simulation capabilities for various PET tomograph designs, including block-based and pixelated detectors.

Main Methods:

Implemented a new model simulating detector systems as flexible arrays of rectangular boxes.
Tested the block detector model against analytical results and existing SimSET simulations.
Compared simulated and experimental sensitivities using a General Electric DSTE PET scanner with different phantom sizes and acquisition modes.

Main Results:

The block detector model demonstrated statistical and visual validation against analytical data and simulations.
Simulations showed improved agreement with experimental data from a GE DSTE PET scanner compared to previous SimSET releases.
A substantially increased coincidence sensitivity was observed in simulations.

Conclusions:

The increased sensitivity is attributed to simplified default models for energy resolution and scintillation light collection, and the absence of livetime correction.
The new SimSET release offers user-modifiable functions for realistic modeling of tomograph-specific factors.
SimSET software, including source code, remains publicly available.