Korean J Radiol.  2015 Dec;16(6):1257-1261. 10.3348/kjr.2015.16.6.1257.

F-18 Fluoride Positron Emission Tomography-Computed Tomography for Detecting Atherosclerotic Plaques

• Kang WJ

• KMID: 2344279
• DOI: http://doi.org/10.3348/kjr.2015.16.6.1257

Abstract

A large number of major cardiovascular events occur in patients due to minimal or some lumen narrowing of the coronary artery. Recent biological studies have shown that the biological composition or vulnerability of the plaque is more critical for plaque rupture compared to the degree of stenosis. To overcome the limitations of anatomical images, molecular imaging techniques have been suggested as promising imaging tools in various fields. F-18 fluorodeoxyglucose (FDG), which is widely used in the field of oncology, is an example of molecular probes used in atherosclerotic plaque evaluation. FDG is a marker of plaque macrophage glucose utilization and inflammation, which is a prominent characteristic of vulnerable plaque. Recently, F-18 fluoride has been used to visualize vulnerable plaque in clinical studies. F-18 fluoride accumulates in regions of active microcalcification, which is normally observed during the early stages of plaque formation. More studies are warranted on the accumulation of F-18 fluoride and plaque formation/vulnerability; however, due to high specific accumulation, low background activity, and easy accessibility, F-18 fluoride is emerging as a promising non-invasive imaging probe to detect vulnerable plaque.

Keyword

Fluoride; PET; Atherosclerosis; Vulnerable plaque

MeSH Terms

Atherosclerosis/pathology/*radiography
Coronary Vessels
Fluorodeoxyglucose F18/chemistry
Humans
Plaque, Atherosclerotic
*Positron-Emission Tomography
*Tomography, X-Ray Computed
Fluorodeoxyglucose F18

Figure

• 

  Fig. 1 F-18 fluoride PET-CT in 80-year-old male with stable angina. A. CT image shows similar calcifications in left circumflex artery (arrow) and left anterior descending artery (arrowhead). CT findings suggest that there is no difference in macrocalcification. B. F-18 fluoride PET shows high uptake at left circumflex artery (arrow) and mild uptake at left anterior descending artery (arrowhead). F-18 fluoride PET findings suggest that left circumflex artery has more microcalcification than left anterior descending artery, and has high probability for vulnerable plaque. C. PET-CT fusion image (Courtesy of Dr. Jin Chul Paeng in Seoul National University Hospital). PET = positron emission tomography

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