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PerfTool: a software platform for investigating bolus-tracking perfusion imaging quantification strategies.

Jayme C Kosior1, Richard Frayne

  • 1Department of Electrical and Computer Engineering, University of Calgary, Calgary, Alberta, Canada.

Journal of Magnetic Resonance Imaging : JMRI
|February 28, 2007
PubMed
Summary

PerfTool software enables comprehensive evaluation of perfusion imaging algorithms. It accurately assesses methods like singular value deconvolution (SVD), improving cerebral blood flow (CBF) estimates by addressing arterial-tissue delay (ATD).

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Area of Science:

  • Medical Imaging
  • Computational Biology
  • Biomedical Engineering

Background:

  • Quantitative perfusion imaging is crucial for diagnosing and monitoring various medical conditions.
  • Existing methods for evaluating perfusion imaging algorithms can be time-consuming and lack comprehensive assessment capabilities.
  • Arterial-tissue delay (ATD) and regularization parameters significantly impact the accuracy of cerebral blood flow (CBF) estimations.

Purpose of the Study:

  • To develop PerfTool, a software platform for evaluating bolus-tracking quantitative perfusion imaging methods.
  • To create a rapid visualization and performance evaluation method for perfusion algorithms.
  • To assess the impact of ATD and SVD regularization on CBF estimates.

Main Methods:

  • Developed PerfTool software platform for interactive algorithm evaluation.
  • Utilized synthetic DeltaR2* data sets with varying perfusion parameters (test patterns).
  • Compared standard SVD (sSVD) and a reformulated ATD-insensitive SVD (rSVD) using patient data and test patterns.

Main Results:

  • Demonstrated CBF overestimation with sSVD due to ATD sensitivity compared to rSVD.
  • Confirmed the effect of ATD on CBF estimates using patient data and test patterns.
  • Showcased CBF underestimation linked to high SVD regularization parameters (p(SVD)) with test patterns.

Conclusions:

  • PerfTool is an extensible software solution for perfusion measurements.
  • The platform supports diverse evaluation methods and facilitates the incorporation of new developments.
  • PerfTool enables application of new algorithms to real patient data and test patterns for robust validation.