What POSITRON EMISSION TOMOGRAPHY (PET) means: PET scans use radiopharmaceuticals to create 3 dimensional images. The decay of the radiotracers used with PET scans produce small particles called positrons. When positrons react with electrons in the body they annihilate each other. This annihilation produces two photons that shoot off in opposite directions. The detectors in the PET scanner measure these photons and use this information to create images of internal organs.
- Definition Photon:
- Dictionary A particle of light or electromagnetic radiation. The energies of photons range from high-energy gamma rays and x-rays to low-energy radio waves positron emission tomography (pet) definition.
- Definition Polymer:
- Dictionary composed of many repeating subunits. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA. Polymers have unique physical properties, including positron emission tomography (pet) explain.
- Definition Progenitor Cells:
- Dictionary Progenitor cells are cells that are similar to stem cells but instead of the ability to become any type of cell, they are already predisposed to develop into a particular type of cell positron emission tomography (pet) what is.
- Definition Piezoelectric Crystals:
- Dictionary transducer of an ultrasound device that vibrate when an electric signal is applied, emitting high-frequency sound pressure waves. The crystals are the crucial component of an ultrasound device both positron emission tomography (pet) meaning.
