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Physical measures of image quality in photostimulable phosphor radiographic systems

Publication ,  Journal Article
Samei, E; Flynn, MJ
Published in: Proceedings of SPIE - The International Society for Optical Engineering
December 1, 1997

The purpose of this study was to critically assess and compare the intrinsic resolution, noise, and signal-to-noise transfer characteristics of two modern digital photostimulable phosphor (PSP) radiographic systems. Two commercial PSP systems were evaluated by identical methodologies. Measurements were made at three beam qualities using standard-resolution and high-resolution screens. The presampled modulation transfer functions (MTF) of the systems were measured using an edge method. The noise power spectra (NPS) were determined by 2D Fourier analysis of uniformly exposed radiographs. The frequency-dependent detective quantum efficiencies (DQE) were obtained from the MTF and NPS measures and the input signal-to-noise ratio, determined by a computational model for x-ray spectrum which was verified against exposure and half-value-layer measurements. The physical performance of the systems were very similar; a DQE of 0.24 and a spatial frequency of 2.5 cycles/mm at 0.2 MTF were estimated for both systems at 115 kVp using a pixel size of 0.1 mm and standard-resolution screens. The HD screen provided improved MTF with an adverse effect on noise as compared to the GP-25 screen using the same pixel size and beam quality. ©2004 Copyright SPIE - The International Society for Optical Engineering.

Duke Scholars

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

December 1, 1997

Volume

3032

Start / End Page

328 / 338

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
 

Citation

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Samei, E., & Flynn, M. J. (1997). Physical measures of image quality in photostimulable phosphor radiographic systems. Proceedings of SPIE - The International Society for Optical Engineering, 3032, 328–338. https://doi.org/10.1117/12.273999
Samei, E., and M. J. Flynn. “Physical measures of image quality in photostimulable phosphor radiographic systems.” Proceedings of SPIE - The International Society for Optical Engineering 3032 (December 1, 1997): 328–38. https://doi.org/10.1117/12.273999.
Samei E, Flynn MJ. Physical measures of image quality in photostimulable phosphor radiographic systems. Proceedings of SPIE - The International Society for Optical Engineering. 1997 Dec 1;3032:328–38.
Samei, E., and M. J. Flynn. “Physical measures of image quality in photostimulable phosphor radiographic systems.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 3032, Dec. 1997, pp. 328–38. Scopus, doi:10.1117/12.273999.
Samei E, Flynn MJ. Physical measures of image quality in photostimulable phosphor radiographic systems. Proceedings of SPIE - The International Society for Optical Engineering. 1997 Dec 1;3032:328–338.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

December 1, 1997

Volume

3032

Start / End Page

328 / 338

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering