In the featured article of the March 2017 issue of "The Journal of Nuclear Medicine," researchers demonstrate that a new positron emission tomography (PET) radiotracer, gallium-68 (Ga-68)-pentixafor, can quickly and non-invasively identify life-threatening atherosclerotic plaques. The tracer binds to the CXCR4 receptor on inflammatory cells present in atherosclerotic plaques--making it possible to find and treat atherosclerosis early.