Multi-tracer positron emission tomography (PET) can image two or more tracers in a single scan, characterizing multiple aspects of biological functions to provide new insights into many diseases. The technique uses dynamic imaging, resulting in time-activity curves that contain contributions from each tracer present. The process of separating and recovering separate images and/or imaging measur...

A novel aerial tracer particle distribution system has been developed. This is mounted on an unmanned vehicle (UAV) and flown upstream from where surface velocimetry measurements are conducted. Tracer particles can be rapidly deployed across the full channel width distributed in a crescent shape (for larger channels), so that they reach measurement cross section at similar time. enables techniq...

We present a combination of techniques to implement a feature-rich ray tracer that applies adaptive sampling to optimize performance. We build these features upon existing methods in which we experiment with techniques to optimally combine them in a ray tracer.

Positron emission tomography (PET) can image a wide variety of functional and physiological parameters in vivo using different radiotracers. As more is learned about the molecular basis for disease and treatment, the potential value of molecular imaging for characterizing and monitoring disease status has increased. Characterizing multiple aspects of tumor physiology by imaging multiple PET tra...