Development of a novel energy-resolved photon-counting detector for gamma ray imaging applications

L. J. Meng, J. W. Tan, K. Spartiotis, T. Schulman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we present the design and preliminary performance evaluation of a novel energy-resolved photon-counting (ERPC) detector for gamma ray imaging applications. The prototype ERPC detector has an active area of 4.4 cm x 4.4 cm, which is pixelated into 128 x 128 square pixels with a pitch size of 350 μm 350 μm. The current detector consists of multiple detector hybrids, each with a CdTe crystal of 1.1 cm x 2.2 cm x 1 mm, bump-bonded onto a customdesigned application-specific integrated circuit (ASIC). The ERPC ASIC has 2048 readout channels arranged in a 3264 array. Each channel is equipped with pre- and shaping-amplifiers, a discriminator, peak/hold circuitry, and an analog-todigital converter (ADC) for digitizing the signal amplitude. In order to compensate for the pixel-to-pixel variation, two 8-bit DACs are implemented into each channel for tuning the gain and offset. The ERPC detector is designed to offer a high spatial resolution, a wide dynamic range of 12-200 keV and a good energy resolution of 3-4 keV. The hybrid detector configuration provides a flexible detection area that can be easily tailored for different imaging applications. The intrinsic performance of a prototype ERPC detector was evaluated with various gamma ray sources, and the results are presented.

Original languageEnglish (US)
Title of host publicationHard X-Ray, Gamma-Ray, and Neutron Detector Physics XI
DOIs
StatePublished - Dec 11 2009
EventHard X-Ray, Gamma-Ray, and Neutron Detector Physics XI - San Diego, CA, United States
Duration: Aug 3 2009Aug 6 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7449
ISSN (Print)0277-786X

Other

OtherHard X-Ray, Gamma-Ray, and Neutron Detector Physics XI
CountryUnited States
CitySan Diego, CA
Period8/3/098/6/09

Keywords

  • CdTe detector
  • Energy-resolved photon-counting (ERPC)
  • Gamma ray detection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Meng, L. J., Tan, J. W., Spartiotis, K., & Schulman, T. (2009). Development of a novel energy-resolved photon-counting detector for gamma ray imaging applications. In Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI [74490I] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7449). https://doi.org/10.1117/12.830002