Definition: A fluoroscopist is a medical professional who uses a high-speed, low-power light source to image and identify cells, tissues, or other biological materials. They are trained in the use of specialized equipment such as a fluoroscope and a microscope. The purpose of this type of imaging is to visualize internal structures and diseases that may be difficult to access by other methods. Fluoroscopists are often involved in research projects and diagnostic services for medical professionals, including radiologists and pathologists.