Human subject images with an active dual-energy computed radiography system and comparison with a commercial `sandwich' detector system

J Anthony Seibert, Robert E. Alvarez, Carolyn Kimme-Smith

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

We have developed a new detector for dual energy computed radiography that uses fast switching of the x-ray tube voltage. Voltage switching gives x-ray spectra with wider separation and lower average energy than conventional `sandwich' detectors. When properly optimized, these better-conditioned spectra produce dual energy images with lower noise for the same dose. We constructed a prototype of the detector, optimized it, and used it to produce human subject images of ten human volunteers. We also compared the performance of the active detector with a commercial dual-energy, computed radiography system that uses a sandwich detector. The results are as follows: We were able to produce high quality images for all ten volunteers. There were slight artifacts at the edge of the heart in some of the images but these did not affect their diagnostic utility. The active detector required approximately 1/4 the entrance exposure of the commercial, dual-energy system to produce diagnostic quality images of an anthropomorphic chest phantom. A substantial decrease in radiation exposure can be obtained with the dual-energy active detector approach with a modest increase in the complexity of the acquisition equipment.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages455-463
Number of pages9
Volume3659
EditionI
StatePublished - 1999
EventProceedings of the 1999 Medical Imaging - Physics of Medical Imaging - San Diego, CA, USA
Duration: Feb 21 1999Feb 23 1999

Other

OtherProceedings of the 1999 Medical Imaging - Physics of Medical Imaging
CitySan Diego, CA, USA
Period2/21/992/23/99

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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  • Cite this

    Seibert, J. A., Alvarez, R. E., & Kimme-Smith, C. (1999). Human subject images with an active dual-energy computed radiography system and comparison with a commercial `sandwich' detector system. In Proceedings of SPIE - The International Society for Optical Engineering (I ed., Vol. 3659, pp. 455-463). Society of Photo-Optical Instrumentation Engineers.