Specialty and Prototype Systems
H3D has developed prototype CZT systems for the Department of Defense DTRA and for applications such as proton cancer therapy, space science, and homeland security. Below are example systems we have produced. Please contact us directly if you are interested in learning more about these instruments or if you have other applications in mind.
Polaris-J was designed to image high-energy gamma rays which are produced during proton cancer therapy. In principle, the prompt gamma-ray emissions from proton interactions with tissue can be used to monitor the proton beam in-vivo, providing real-time knowledge of the tumor location, beam position, and beam penetration depth during treatment. Polaris-J will consist of 64 CZT crystals for a total volume of 320 cm3. A 16-crystal system is already undergoing tests at the Maryland Proton Treatment Center in support of a 5-year NIH effort. The readout system is being optimized for the high-flux conditions of proton cancer therapy.
Polaris-J has undergone several phases of development. A study with a previous version of Polaris-J demonstrated the ability to measure shifts as small as 3-mm in the beam range.
This system was designed for use on planetary science missions. The goal is to image the gamma rays that are observed following neutron activation of soil on alien planets. The imaging capability of Polaris technology enables discrimination between the gamma rays that are actually emitted from the soil and the gamma rays that are generated when the neutrons strike the rover.
These and related systems are patent protected by: U.S. Pat No. 7,411,197 and U.S. Pat No. 7,692,155 under license from the University of Michigan.