Dual energy radiography using active detector technology

J Anthony Seibert, T. F. Poage, R. E. Alvarez

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

3 Citations (Scopus)

Abstract

A new technology has been implemented using an `active-detector' comprised of two computed radiography (CR) imaging plates in a sandwich geometry for dual-energy radiography. This detector allows excellent energy separation, short exposure time, and high signal to noise ratio (SNR) for clinically robust `bone-only' and `soft-tissue only' images with minimum patient motion. Energy separation is achieved by two separate exposures at widely different kVp's: the high energy (120 kVp+1.5 mm Cu filter) exposure is initiated first, followed by a short burst of intense light to erase the latent image on the front plate, and then a 50 kVp (low energy) exposure. A personal computer interfaced to the x-ray generator, filter wheel, and active detector system orchestrates the acquisition sequence within a time period of 150 msec. The front and back plates are processed using a CR readout algorithm with fixed speed and wide dynamic range. `Bone-only' and `soft-tissue only' images are calculated by geometric alignment of the two images and application of dual energy decomposition algorithms on a pixel by pixel basis. Resultant images of a calibration phantom demonstrate an increase of SNR2/ dose by approximately 73 times when compared to a single exposure `passive-detector' comprised of CR imaging plates, and an approximately 8 fold increase compared to a screen-film dual-energy cassette comprised of different phosphor compounds. In conclusion, dual energy imaging with `active detector' technology is clinically feasible and can provide substantial improvements over conventional methods for dual-energy radiography.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium & Medical Imaging Conference
Place of PublicationPiscataway, NJ, United States
PublisherIEEE
Pages1244-1247
Number of pages4
Volume2
StatePublished - 1996
EventProceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3) - Anaheim, CA, USA
Duration: Nov 2 1996Nov 9 1996

Other

OtherProceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3)
CityAnaheim, CA, USA
Period11/2/9611/9/96

Fingerprint

Radiography
Detectors
Imaging techniques
Bone
Pixels
Tissue
Personal computers
Phosphors
Signal to noise ratio
Wheels
Calibration
Decomposition
X rays
Geometry

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Seibert, J. A., Poage, T. F., & Alvarez, R. E. (1996). Dual energy radiography using active detector technology. In IEEE Nuclear Science Symposium & Medical Imaging Conference (Vol. 2, pp. 1244-1247). Piscataway, NJ, United States: IEEE.

Dual energy radiography using active detector technology. / Seibert, J Anthony; Poage, T. F.; Alvarez, R. E.

IEEE Nuclear Science Symposium & Medical Imaging Conference. Vol. 2 Piscataway, NJ, United States : IEEE, 1996. p. 1244-1247.

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

Seibert, JA, Poage, TF & Alvarez, RE 1996, Dual energy radiography using active detector technology. in IEEE Nuclear Science Symposium & Medical Imaging Conference. vol. 2, IEEE, Piscataway, NJ, United States, pp. 1244-1247, Proceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3), Anaheim, CA, USA, 11/2/96.
Seibert JA, Poage TF, Alvarez RE. Dual energy radiography using active detector technology. In IEEE Nuclear Science Symposium & Medical Imaging Conference. Vol. 2. Piscataway, NJ, United States: IEEE. 1996. p. 1244-1247
Seibert, J Anthony ; Poage, T. F. ; Alvarez, R. E. / Dual energy radiography using active detector technology. IEEE Nuclear Science Symposium & Medical Imaging Conference. Vol. 2 Piscataway, NJ, United States : IEEE, 1996. pp. 1244-1247
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