Perfusion vector-a new method to quantify myocardial perfusion scintigraphy images: a simulation study with...

Area of Science:

• Cardiology
• Medical Imaging
• Quantitative Analysis

Background:

• Myocardial perfusion scintigraphy (MPS) interpretation relies on subjective visual assessment.
• Accurate localization and extent of perfusion defects are crucial for diagnosis.

Purpose of the Study:

• To introduce and evaluate the perfusion vector as an objective, quantitative tool for MPS.
• To assist and enhance physician-based visual interpretation of MPS.

Main Methods:

• Calculated perfusion vector by comparing anatomical and perfusion centers of the left ventricle.
• Utilized simulated MPS images (SIMIND, XCAT phantom) and a patient cohort (40 normal, 80 abnormal).
• Analyzed vector components and correlated them with defect size and patient groups.

Main Results:

• Simulated defects showed proportional changes in specific vector components based on size and location.
• Significant differences in stress perfusion vectors were observed between normal and abnormal patient groups across multiple axes.
• Strong correlation found between defect size and stress vector magnitude (p < 0.001).

Conclusions:

• The perfusion vector concept demonstrates potential as an objective aid for MPS interpretation.
• Further clinical validation is required to fully establish its utility in patient studies.