The PET scanner detects these emissions and creates a 3D map. Unlike a CT scan which shows anatomy (bones and tissue), an O-15 scan shows —specifically, how much blood is reaching your tissues and how fast those tissues are using up oxygen.
The patient is injected with water labeled with O-15 ($H_2^15O$) or is asked to inhale trace amounts of $^15O_2$ gas. As the blood circulates, the isotope decays and emits positrons. ox imágenes
Users searching for "ox imágenes" are often directed toward these common recovery steps: The PET scanner detects these emissions and creates a 3D map