Stress myocardial CT perfusion: an update and future perspective

Area of Science:

• Cardiovascular imaging
• Radiology
• Medical diagnostics

Background:

• Coronary computed tomography angiography (CTA) accurately detects coronary stenosis but often fails to determine its physiological significance.
• Stress myocardial computed tomography perfusion (CTP) offers a solution by providing both anatomical and perfusion data.

Purpose of the Study:

• To review the performance and interpretation of stress myocardial CTP.
• To summarize current literature on combined CTA/CTP protocols.
• To discuss future directions for this emerging technique.

Main Methods:

• Review of single-center studies establishing feasibility of stress CTP.
• Analysis of combined CTA/CTP protocols versus CTA alone.
• Comparison of radiation dose with nuclear myocardial perfusion imaging.

Main Results:

• Combined CTA/CTP protocols demonstrate improved diagnostic accuracy for hemodynamically significant stenosis compared to CTA alone.
• Stress CTP provides both anatomic and physiological information (myocardial perfusion).
• The combined protocol can achieve radiation doses comparable to nuclear imaging.

Conclusions:

• Stress myocardial CTP is an emerging technique with significant potential for evaluating chest pain patients.
• Further research is needed to define, validate, and optimize stress CTP.
• The combined CTA/CTP approach offers advantages like short exam time and comprehensive data acquisition.