Novel hybrid imaging modalities

George C. Giakos, Srinivasan Vedantham, Samir Chowdhury, Bindu Pillai

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


The purpose of this paper is to present the engineering principles of a cost-effective and efficient positron emission tomography (PET) detector operating on novel hybrid principles. The novelty of the proposed technology, which can be considered a low-cost alternative to the photomultiplier tube, consists of a BaF2 crystal coupled to coupled to an ultra low-pressure noble-gas filled tube, which operates under photoionization of excited states, in the prebreakdown regime. The design detector principles, the first Townsend coefficient, and the gas multiplication factor of the hybrid microstrip detector have been studied. The results of this study indicate that an adequate gas multiplication process can be achieved with a Xe filled gas detector operating at low gas pressures. Also, low-pressure gas-filled detectors have the advantages of being themselves insensitive to radiation, ensuring that only the light from the scintillator is detected in a high-energy radiation environment.

Original languageEnglish (US)
Pages (from-to)476-487
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1997
Externally publishedYes
EventMedical Imaging 1997: Physics of Medical Imaging - Newport Beach, CA, United States
Duration: Feb 23 1997Feb 23 1997

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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