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.

R&D Proton-Therapy Imaging System

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™ consists of 64 CZT crystals and a total volume of 310 cm3. The readout system is optimized for the high-flux conditions of proton cancer therapy. It is already undergoing tests at the Maryland Proton Treatment Center in support of a 5-year NIH effort.

See the Polaris-J™ spec sheet for more information.

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.


Polaris-M™ Imaging Spectrometer

Polaris-M™ was designed for radiation protection in medical facilities, featuring gamma-ray imaging and spectroscopy up to 1 MeV. Locate x-ray leakage and pinpoint dropped brachytherapy seeds. See the spec sheet for more information.

R&D Space-Science System

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.

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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.