CT imaging of myocardial perfusion: possibilities and perspectives

Area of Science:

• Cardiology
• Medical Imaging
• Radiology

Background:

• Functional imaging is vital for identifying patients with coronary artery disease (CAD) who may benefit from revascularization.
• Established methods like SPECT MPI, stress perfusion MRI, and invasive FFR have high diagnostic accuracy for detecting hemodynamically significant stenosis.
• Current guidelines recommend coronary CT angiography (CTA) primarily for excluding CAD.

Purpose of the Study:

• To evaluate the diagnostic accuracy of computed tomography myocardial perfusion imaging (CT-MPI) for assessing coronary artery disease.
• To explore the potential of CT-MPI as a combined anatomical and functional imaging modality.
• To identify areas for future research, including the prognostic value of CT-MPI.

Main Methods:

• Review of initial clinical studies on CT-MPI.
• Comparison of CT-MPI diagnostic accuracy with established imaging modalities (SPECT MPI, stress perfusion MRI, invasive FFR).
• Consideration of acquisition protocols and post-processing algorithms for CT-MPI.

Main Results:

• Initial clinical studies indicate that CT-MPI achieves diagnostic accuracy comparable to established functional imaging techniques.
• Cardiac CT, through CT-MPI, has the potential to provide both anatomical and functional assessment of the heart.
• CT-MPI protocols and algorithms require further evaluation.

Conclusions:

• CT-MPI demonstrates promising diagnostic accuracy for coronary artery disease, potentially offering a combined anatomical and functional imaging approach.
• Further studies are necessary to confirm the prognostic value of CT-MPI for stratifying cardiovascular event risk.
• Consideration of radiation exposure and contrast agent administration is important for CT-MPI implementation.