DQE and system optimization for indirect-detection flat-panel imagers in diagnostic radiology

Jeff Siewerdsen, L. E. Antonuk

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

Abstract

The performance of indirect-detection flat-panel imagers incorporating CsI:Tl x-ray converters is examined through calculation of the detective quantum efficiency (DQE) under conditions of chest radiography, fluoroscopy, and mammography. Calculations are based upon a cascaded systems model which has demonstrated excellent agreement with empirical signal, noise-power spectra, and DQE results. For each application, the DQE is calculated as a function of spatial-frequency and CsI:Tl thickness. A preliminary investigation into the optimization of flat-panel imaging systems is described, wherein the x-ray converter thickness which provides optimal DQE for a given imaging task is estimated. For each application, a number of example tasks involving detection of an object of variable size and contrast against a noisy background are considered. The method described is fairly general and can be extended to account for a variety of imaging tasks. For the specific examples considered, the preliminary results estimate optimal CsI:Tl thicknesses of ∼450 μm (∼200 mg/cm2), ∼320 μm (∼140 mg/cm2), and ∼200 μm (∼90 mg/cm2) for chest radiography, fluoroscopy, and mammography, respectively. These results are expected to depend upon the imaging task as well as upon the quality of available CsI:Tl, and furore improvements in scintillator fabrication could result in increased optimal thickness and DQE.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsJ.T. Dobbins III, J.M. Boone
Pages546-555
Number of pages10
Volume3336
DOIs
StatePublished - 1998
Externally publishedYes
EventMedical Imaging 1998: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 22 1998Feb 24 1998

Other

OtherMedical Imaging 1998: Physics of Medical Imaging
CountryUnited States
CitySan Diego, CA
Period2/22/982/24/98

Fingerprint

Radiology
radiology
Quantum efficiency
Image sensors
quantum efficiency
optimization
fluoroscopy
Mammography
chest
Radiography
radiography
Imaging techniques
converters
X rays
noise spectra
Power spectrum
Imaging systems
Phosphors
scintillation counters
power spectra

Keywords

  • Detective quantum efficiency
  • Diagnostic x-ray imaging
  • Flat-panel imagers
  • Fluoroscopy
  • Mammography
  • Optimization
  • Radiography

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Siewerdsen, J., & Antonuk, L. E. (1998). DQE and system optimization for indirect-detection flat-panel imagers in diagnostic radiology. In J. T. Dobbins III, & J. M. Boone (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3336, pp. 546-555) https://doi.org/10.1117/12.317057

DQE and system optimization for indirect-detection flat-panel imagers in diagnostic radiology. / Siewerdsen, Jeff; Antonuk, L. E.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / J.T. Dobbins III; J.M. Boone. Vol. 3336 1998. p. 546-555.

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

Siewerdsen, J & Antonuk, LE 1998, DQE and system optimization for indirect-detection flat-panel imagers in diagnostic radiology. in JT Dobbins III & JM Boone (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 3336, pp. 546-555, Medical Imaging 1998: Physics of Medical Imaging, San Diego, CA, United States, 2/22/98. https://doi.org/10.1117/12.317057
Siewerdsen J, Antonuk LE. DQE and system optimization for indirect-detection flat-panel imagers in diagnostic radiology. In Dobbins III JT, Boone JM, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3336. 1998. p. 546-555 https://doi.org/10.1117/12.317057
Siewerdsen, Jeff ; Antonuk, L. E. / DQE and system optimization for indirect-detection flat-panel imagers in diagnostic radiology. Proceedings of SPIE - The International Society for Optical Engineering. editor / J.T. Dobbins III ; J.M. Boone. Vol. 3336 1998. pp. 546-555
@inproceedings{6fbd1b5a03c1470dac5c3da1927badd1,
title = "DQE and system optimization for indirect-detection flat-panel imagers in diagnostic radiology",
abstract = "The performance of indirect-detection flat-panel imagers incorporating CsI:Tl x-ray converters is examined through calculation of the detective quantum efficiency (DQE) under conditions of chest radiography, fluoroscopy, and mammography. Calculations are based upon a cascaded systems model which has demonstrated excellent agreement with empirical signal, noise-power spectra, and DQE results. For each application, the DQE is calculated as a function of spatial-frequency and CsI:Tl thickness. A preliminary investigation into the optimization of flat-panel imaging systems is described, wherein the x-ray converter thickness which provides optimal DQE for a given imaging task is estimated. For each application, a number of example tasks involving detection of an object of variable size and contrast against a noisy background are considered. The method described is fairly general and can be extended to account for a variety of imaging tasks. For the specific examples considered, the preliminary results estimate optimal CsI:Tl thicknesses of ∼450 μm (∼200 mg/cm2), ∼320 μm (∼140 mg/cm2), and ∼200 μm (∼90 mg/cm2) for chest radiography, fluoroscopy, and mammography, respectively. These results are expected to depend upon the imaging task as well as upon the quality of available CsI:Tl, and furore improvements in scintillator fabrication could result in increased optimal thickness and DQE.",
keywords = "Detective quantum efficiency, Diagnostic x-ray imaging, Flat-panel imagers, Fluoroscopy, Mammography, Optimization, Radiography",
author = "Jeff Siewerdsen and Antonuk, {L. E.}",
year = "1998",
doi = "10.1117/12.317057",
language = "English (US)",
volume = "3336",
pages = "546--555",
editor = "{Dobbins III}, J.T. and J.M. Boone",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - DQE and system optimization for indirect-detection flat-panel imagers in diagnostic radiology

AU - Siewerdsen, Jeff

AU - Antonuk, L. E.

PY - 1998

Y1 - 1998

N2 - The performance of indirect-detection flat-panel imagers incorporating CsI:Tl x-ray converters is examined through calculation of the detective quantum efficiency (DQE) under conditions of chest radiography, fluoroscopy, and mammography. Calculations are based upon a cascaded systems model which has demonstrated excellent agreement with empirical signal, noise-power spectra, and DQE results. For each application, the DQE is calculated as a function of spatial-frequency and CsI:Tl thickness. A preliminary investigation into the optimization of flat-panel imaging systems is described, wherein the x-ray converter thickness which provides optimal DQE for a given imaging task is estimated. For each application, a number of example tasks involving detection of an object of variable size and contrast against a noisy background are considered. The method described is fairly general and can be extended to account for a variety of imaging tasks. For the specific examples considered, the preliminary results estimate optimal CsI:Tl thicknesses of ∼450 μm (∼200 mg/cm2), ∼320 μm (∼140 mg/cm2), and ∼200 μm (∼90 mg/cm2) for chest radiography, fluoroscopy, and mammography, respectively. These results are expected to depend upon the imaging task as well as upon the quality of available CsI:Tl, and furore improvements in scintillator fabrication could result in increased optimal thickness and DQE.

AB - The performance of indirect-detection flat-panel imagers incorporating CsI:Tl x-ray converters is examined through calculation of the detective quantum efficiency (DQE) under conditions of chest radiography, fluoroscopy, and mammography. Calculations are based upon a cascaded systems model which has demonstrated excellent agreement with empirical signal, noise-power spectra, and DQE results. For each application, the DQE is calculated as a function of spatial-frequency and CsI:Tl thickness. A preliminary investigation into the optimization of flat-panel imaging systems is described, wherein the x-ray converter thickness which provides optimal DQE for a given imaging task is estimated. For each application, a number of example tasks involving detection of an object of variable size and contrast against a noisy background are considered. The method described is fairly general and can be extended to account for a variety of imaging tasks. For the specific examples considered, the preliminary results estimate optimal CsI:Tl thicknesses of ∼450 μm (∼200 mg/cm2), ∼320 μm (∼140 mg/cm2), and ∼200 μm (∼90 mg/cm2) for chest radiography, fluoroscopy, and mammography, respectively. These results are expected to depend upon the imaging task as well as upon the quality of available CsI:Tl, and furore improvements in scintillator fabrication could result in increased optimal thickness and DQE.

KW - Detective quantum efficiency

KW - Diagnostic x-ray imaging

KW - Flat-panel imagers

KW - Fluoroscopy

KW - Mammography

KW - Optimization

KW - Radiography

UR - http://www.scopus.com/inward/record.url?scp=0032404162&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032404162&partnerID=8YFLogxK

U2 - 10.1117/12.317057

DO - 10.1117/12.317057

M3 - Conference contribution

AN - SCOPUS:0032404162

VL - 3336

SP - 546

EP - 555

BT - Proceedings of SPIE - The International Society for Optical Engineering

A2 - Dobbins III, J.T.

A2 - Boone, J.M.

ER -