CT stress myocardial perfusion imaging using multidetector CT--A review

Area of Science:

• Cardiovascular imaging
• Radiology
• Medical diagnostics

Background:

• Coronary artery disease (CAD) diagnosis often relies on coronary angiography (CTA), but lesion significance can be unclear.
• CT myocardial perfusion imaging (CTP) is an emerging technique to detect myocardial ischemia during vasodilator stress.

Purpose of the Study:

• To review the fundamentals, advancements, and accuracy of CT perfusion imaging.
• To explore the combined value of CTA and CTP for diagnosing hemodynamically significant coronary stenoses.

Main Methods:

• Review of current literature on CT perfusion imaging techniques and protocols.
• Analysis of studies evaluating the accuracy of CTP, alone and combined with CTA.
• Discussion of scanner technology and imaging advancements.

Main Results:

• CTP shows feasibility and incremental value when combined with CTA for identifying significant coronary artery lesions.
• Combined CTA/CTP imaging allows assessment of both coronary anatomy and myocardial perfusion in one examination.
• Radiation dose is comparable to nuclear medicine imaging.

Conclusions:

• Combined CTA/CTP imaging holds significant potential for comprehensive CAD assessment.
• CT perfusion imaging is still developing, requiring further research for validation and optimization.
• Future research should focus on refining techniques and establishing clinical utility.