Non-invasive anatomical and functional imaging for the detection of coronary artery disease

Area of Science:

• Cardiology
• Medical Imaging
• Diagnostic Techniques

Background:

• Coronary artery disease (CAD) remains a significant cause of illness and death in Western countries.
• Invasive coronary angiography is the standard for diagnosing significant coronary artery stenosis but has limitations.
• The need for non-invasive diagnostic methods has increased due to the drawbacks of angiography and the high number of patients without significant stenosis.

Purpose of the Study:

• To provide a comprehensive overview of current imaging modalities used for diagnosing CAD.
• To discuss the evolution from traditional functional imaging to newer non-invasive anatomical imaging techniques.
• To highlight the ongoing development of non-invasive coronary angiography using computed tomography and cardiac magnetic resonance.

Main Methods:

• Review of existing literature on diagnostic imaging for coronary artery disease.
• Comparison of functional imaging techniques (SPECT, PET, stress echocardiography, CMR) for detecting ischemia.
• Discussion of emerging non-invasive anatomical imaging techniques (CT, CMR angiography).

Main Results:

• Functional imaging techniques can effectively rule out flow-limiting stenosis but do not visualize atherosclerosis.
• Non-invasive coronary angiography techniques, including computed tomography and cardiac magnetic resonance, are under development.
• A substantial number of patients referred for conventional angiography are found to be free of significant stenosis, underscoring the need for non-invasive alternatives.

Conclusions:

• Non-invasive imaging modalities are crucial for the accurate and efficient diagnosis of coronary artery disease.
• While functional imaging detects ischemia, anatomical imaging is necessary for visualizing atherosclerosis.
• Advancements in computed tomography and cardiac magnetic resonance angiography promise improved non-invasive diagnosis of CAD.