Preliminary experience with dynamic CT myocardial perfusion imaging: a single-centre perspective.

Area of Science:

• Cardiovascular Imaging
• Radiology
• Medical Diagnostics

Background:

• Coronary Artery Disease (CAD) diagnosis relies on invasive methods.
• Non-invasive dynamic coronary computed tomography perfusion (CTP) offers a potential alternative.
• Optimizing CTP protocols is crucial for accurate CAD assessment.

Purpose of the Study:

• To optimize the dynamic coronary computed tomography perfusion (CTP) protocol.
• To evaluate CTP's diagnostic accuracy for hemodynamically significant CAD.
• To compare CTP with invasive coronary angiography (ICA) and fractional flow reserve (FFR).

Main Methods:

• Dynamic CTP was performed on 34 symptomatic patients with suspected CAD.
• CTP findings were compared with cardiac CT angiography (CCTA) and ICA/FFR.
• Myocardial segments were analyzed for perfusion deficits and stenosis.

Main Results:

• 73.3% of myocardial segments showed normal perfusion; 26.6% exhibited hypoperfusion.
• CTP demonstrated 100% sensitivity but 22% specificity for significant stenosis detection.
• CTP incorporation led to a 29.4% reclassification in management strategies.

Conclusions:

• Dynamic CTP shows potential for CAD detection but requires protocol optimization.
• Low specificity necessitates further refinement of CTP protocols and myocardial blood flow thresholds.
• Improved specificity will enhance CTP's clinical applicability in diagnosing significant CAD.