Clinical Molecular Imaging for Atherosclerotic Plaque
Anton Kondakov1, Vladimir Lelyuk1
1Radiology and Clinical Physiology Research Center, Federal Center of Brain Research and Neurotechnologies of the Federal Medical Biological Agency, 117513 Moscow, Russia.
Insights
Molecular imaging aids in detecting atherosclerosis by visualizing plaque inflammation and progression. Radiotracers like FDG and fluoride show promise in predicting cardiovascular events, though standardized protocols are needed.
Area of Science:
- Cardiovascular Medicine
- Radiology
- Molecular Imaging
Background:
- Atherosclerosis is a major cause of cardiovascular events like heart attack and stroke.
- High mortality rates drive research in prevention, early detection, and treatment.
- Molecular imaging offers insights into plaque progression and instability, particularly inflammation.
Purpose of the Study:
- To review the role of molecular imaging in atherosclerosis.
- To highlight common radiotracers and their applications.
- To identify limitations and suggest future research directions.
Main Methods:
- Review of current molecular imaging techniques for atherosclerosis.
- Discussion of radiotracers detecting energy metabolism (FDG), macrophages (somatostatin receptor imaging), cell proliferation (choline), and microcalcifications (fluoride imaging).
- Analysis of the predictive value of radiopharmaceuticals for cardiovascular events.
Main Results:
- FDG and fluoride imaging can predict cardiovascular events.
- Specific radiotracers target key pathophysiological processes in atherosclerosis.
- Limitations include tracer uptake, disease overlap, and physiological distribution.
Conclusions:
- Molecular imaging is valuable for understanding atherosclerosis.
- Standardized protocols for patient preparation, data acquisition, and quantification are essential for research.
- Further development is needed to overcome current limitations.
Abstract:
Atherosclerosis is a well-known disease leading to cardiovascular events, including myocardial infarction and ischemic stroke. These conditions lead to a high mortality rate, which explains the interest in their prevention, early detection, and treatment. Molecular imaging is able to shed light on the basic pathophysiological processes, such as inflammation, that cause the progression and instability of plaque. The most common radiotracers used in clinical practice can detect increased energy metabolism (FDG), macrophage number (somatostatin receptor imaging), the intensity of cell proliferation in the area (labeled choline), and microcalcifications (fluoride imaging). These radiopharmaceuticals, especially FDG and labeled sodium fluoride, can predict cardiovascular events. The limitations of molecular imaging in atherosclerosis include low uptake of highly specific tracers, possible overlap with other diseases of the vessel wall, and specific features of certain tracers' physiological distribution. A common protocol for patient preparation, data acquisition, and quantification is needed in the area of atherosclerosis imaging research.
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