Energy-discriminating X-ray computed tomography system utilizing a cadmium telluride detector

Eiichi Sato, Purkhet Abderyim, Toshiyuki Enomoto, Manabu Watanabe, Keitaro Hitomi, Kiyomi Takahasi, Shigehiro Sato, Akira Ogawae, Jun Onagawa

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

An energy-discriminating K-edge X-ray computed tomography (CT) system is useful for increasing contrast resolution of a target region utilizing contrast media and for reducing the absorbed dose for patients. The CT system is of the first-generation type with a cadmium telluride (CdTe) detector, and a projection curve is obtained by translation scanning using the CdTe detector in conjunction with an x-stage. An object is rotated by the rotation step angle using a turntable between the translation scans. Thus, CT is carried out by repeating the translation scanning and the rotation of an object. Penetrating X-ray photons from the object are detected by the CdTe detector, and event signals of X-ray photons are produced using charge-sensitive and shaping amplifiers. Both the photon energy and the energy width are selected by use of a multi-channel analyzer, and the number of photons is counted by a counter card. Demonstration of enhanced iodine K-edge X-ray CT was carried out by selecting photons with energies just beyond the iodine K-edge energy of 33.2 keV.

Original languageEnglish
Pages (from-to)262-265
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume619
Issue number1-3
DOIs
Publication statusPublished - 2010 Jul 1

Keywords

  • CdTe detector
  • Energy discrimination
  • Enhanced iodine K-edge CT
  • Photon counting

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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