Abstract: Gamma-ray detectors for the detection of one or more gamma-rays are provided. Also provided are methods of using the detectors for the detection of one or more gamma-rays. The detectors can be used in high-spatial resolution PET systems, including time-of-flight (TOF)-PET systems. Some of the gamma-ray detectors utilize fluors and an optical imaging system to determine the time and location of a first scattering event of a gamma-ray in a low atomic number scintillating medium. Some of the gamma-ray detectors determine the time and location of a first scattering event of a gamma-ray in a low-density scintillating medium by imaging scintillation photons from the scattering event as a time-series of photon “rings” using a planar pixilated photodetector as a scintillation photon counter.

Abstract: A disinfection system includes a mask chamber and a cassette trolley rail mounted to the mask chamber. The system also includes a mask cassette configured to hold one or more masks and configured to mount to the cassette trolley rail such that the mask cassette translates along the cassette trolley rail. The system also includes a first array of lamps mounted to a first lamp mount within the mask chamber, where the first array of lamps is positioned to emit radiation toward a first side of the mask cassette. The system further includes a second array of lamps mounted to a second lamp mount within the mask chamber, where the second array of lamps is positioned to emit radiation toward a second side of the mask cassette that is opposite the first side of the mask cassette.