Related Experiment Video
Updated: Dec 27, 2025
11:09
High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals
Published on: December 16, 2022
4.1K
Pitfalls in quantitative myocardial PET perfusion I: Myocardial partial volume correction
K Lance Gould1,2,3, Linh Bui4,5, Danai Kitkungvan4,5
1Martin Bucksbaum Distinguished University Chair, Weatherhead P.E.T. Center for Preventing and Reversing Atherosclerosis, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA. k.lance.gould@uth.tmc.edu.
Summary
Standard phantom corrections for Positron Emission Tomography (PET) myocardial perfusion overestimate results. A simple, one-dimensional correction improves risk stratification accuracy for cardiac events.
Area of Science:
- Nuclear Cardiology
- Medical Imaging Physics
Background:
- Quantitative myocardial perfusion imaging using Positron Emission Tomography (PET) necessitates correction for partial volume loss.
- Left ventricular (LV) wall thickness, often smaller than scanner resolution, contributes to this partial volume effect.
Purpose of the Study:
- To evaluate the accuracy of risk stratification for major adverse cardiac events (MACE) after PET perfusion imaging.
- To compare partial volume correction methods derived from two-dimensional ACR and three-dimensional NEMA phantoms against established correlations with MACE.
Main Methods:
- Analysis of 3987 diagnostic rest-stress perfusion PET scans and 187 MACE events.
- Imaging of ACR and NEMA phantoms with Rb-82 or F-18 to assess size-dependent partial volume loss.
- Recalculation of perfusion and Coronary Flow Capacity using different phantom-derived partial volume corrections and statistical comparison.
Main Results:
- Two-dimensional ACR and three-dimensional NEMA phantom-based corrections significantly overestimate partial volume corrections and quantitative perfusion (50%-150%) compared to one-dimensional correction.
- This overestimation substantially impairs accurate risk stratification for cardiac events.
Conclusions:
- Standard two-dimensional ACR and three-dimensional NEMA phantoms overestimate partial volume corrections for LV wall thickness and myocardial perfusion.
- A simple, one-dimensional correction equation correlates with MACE, offering optimal risk stratification for myocardial perfusion quantification on most PET-CT scanners.
