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Related Experiment Video

Updated: Jun 25, 2026

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
06:04

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

Published on: February 14, 2025

Expanding SimSET to include block detectors: performance with pseudo-blocks and a true block model.

R E Schmitz1, S B Gillispie, R L Harrison

  • 1R. E. Schmitz is with the University of Washington, Seattle, WA 98195 USA (telephone: 206-598-5971, e-mail: rschmitz@u.washington.edu ).

IEEE Nuclear Science Symposium Conference Record. Nuclear Science Symposium
|February 13, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces two methods for adding block detectors to SimSET, a simulation tool. Implementing these block structures improves simulation accuracy for positron emission tomography (PET) scanners.

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Setting Limits on Supersymmetry Using Simplified Models
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Published on: November 15, 2013

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Last Updated: Jun 25, 2026

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
06:04

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

Published on: February 14, 2025

Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Area of Science:

  • Medical Physics
  • Computational Imaging
  • Nuclear Medicine

Background:

  • SimSET, a photon tracking simulation package, currently models detectors as solid annuli.
  • This simplification does not accurately represent the geometric nature of block detectors used in modern scanners.
  • Discrepancies between simulation and actual scanner measurements arise from this geometric simplification.

Purpose of the Study:

  • To introduce and evaluate two distinct approaches for implementing block detectors within the SimSET simulation package.
  • To compare the performance of these new implementations against the conventional SimSET model and real-world scanner data.
  • To assess the impact of block detector geometry on simulation accuracy and efficiency.

Main Methods:

  • A pseudo-block approximation was developed by modifying SimSET to discard interactions in specific annulus segments, creating annulus-segment blocks.
  • A more comprehensive modification was planned to implement true rectangular blocks in the SimSET detector module.
  • Both implementations were compared to conventional SimSET results and data from a GE DSTE PET/CT scanner, evaluating sensitivities, crystal maps, energy spectra, and simulation run times.

Main Results:

  • Both implemented block structure approaches showed improved agreement with scanner measurements compared to the conventional SimSET model.
  • The pseudo-block approximation offered a quick and easy method to enhance SimSET's accuracy.
  • The true rectangular block implementation is expected to provide greater variability and fidelity to detail.

Conclusions:

  • Implementing block detector structures in SimSET significantly improves simulation accuracy by addressing geometric discrepancies.
  • The pseudo-block approximation is a valuable interim solution for enhancing SimSET's performance.
  • Further development of true rectangular block implementation promises even greater accuracy and realism in simulations for positron emission tomography (PET) scanners.