Positron Emission Particle Tracking (PEPT): A non‐invasive technique that uses positron‐emitting tracer particles to determine three-dimensional flow dynamics in opaque multiphase systems.

We studied the effects of decreased bronchial blood flow on the uptake of the soluble tracer technetium=99m-labeled diethylenetriamine pentaacetic acid (99 m Tc- DTPA) from subcarinal airways in sheep ...