What question did this study set out to answer?

To evaluate the impact of motion correction on quantitative perfusion metrics and threshold-based interpretation in 13N-ammonia dynamic PET myocardial perfusion imaging.

August 19, 2026DiagnosticsOpen Access

The Effect of Motion Correction on Quantitative Perfusion Indices and Threshold-Based Interpretation in 13N-Ammonia Dynamic PET Myocardial Perfusion Imaging

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Authors

ACAjay Kumar ChaudharyTEDA International Cardiovascular Hospital ZPZekun PangTEDA International Cardiovascular Hospital FZFukai ZhaoTEDA International Cardiovascular Hospital

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Implication

Retrospective study demonstrates motion correction alters stress myocardial blood flow and flow reserve in dynamic PET imaging, highlighting its importance for accurate ischemia assessment.

Key Points

To evaluate the impact of motion correction on quantitative perfusion metrics and threshold-based interpretation in 13N-ammonia dynamic PET myocardial perfusion imaging.
Retrospectively analyzed data from 171 patients who underwent 13N-ammonia dynamic PET/CT myocardial perfusion imaging.
Generated paired motion-corrected (MC) and non-motion-corrected (NMC) datasets, utilizing frame-by-frame post-MC vectors to characterize displacement magnitude and direction.
Evaluated rest and stress myocardial blood flow (MBF), myocardial flow reserve (MFR), and non-invasive fractional flow reserve (niFFR)-like indices across vascular territories.
Patient motion was present during both acquisition phases but occurred more frequently, with greater magnitude and heterogeneity during stress, predominantly along the Y-axis.
Motion correction exerted minimal effect on rest MBF but significantly influenced stress MBF, MFR, and niFFR-like index, most prominently in the left anterior descending artery territory.
Clinical reclassification of MFR and niFFR-like index values was bidirectional and driven by motion magnitude and direction rather than a uniform numerical increase.

Cite This Study

Chaudhary et al. (2026) studied this question.

synapsesocial.com/papers/6a858aaf03308d306e2d805d https://doi.org/10.3390/diagnostics16162610

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Implication

Retrospective study demonstrates motion correction alters stress myocardial blood flow and flow reserve in dynamic PET imaging, highlighting its importance for accurate ischemia assessment.

The Effect of Motion Correction on Quantitative Perfusion Indices and Threshold-Based Interpretation in 13N-Ammonia Dynamic PET Myocardial Perfusion Imaging

Discussion

Member takes

Implication

Key Points

Cite This Study

The Effect of Motion Correction on Quantitative Perfusion Indices and Threshold-Based Interpretation in 13N-Ammonia Dynamic PET Myocardial Perfusion Imaging

Discussion

Member takes

Implication

Key Points

Cite This Study

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