Emissions based scans like PET/SPECT use positrons/gamma rays released by an infused tracer for imaging things like hungry tumors (labeled glucose) but can also

Emissions based scans like PET/SPECT use positrons/gamma rays released by an infused tracer for imaging things like hungry tumors (labeled glucose) but can also be used to image other molecules or receptors. Very low resolution. Usually overlayed on CT scans. Ultrasound has become the best point of care imaging for a lot of things.