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Fundamental imaging characteristics of a slot-scan digital chest radiographic system.

Publication ,  Journal Article
Samei, E; Saunders, RS; Lo, JY; Dobbins, JT; Jesneck, JL; Floyd, CE; Ravin, CE
Published in: Med Phys
September 2004

Our purpose in this study was to evaluate the fundamental image quality characteristics of a new slot-scan digital chest radiography system (ThoraScan, Delft Imaging Systems/Nucletron, Veenendaal, The Netherlands). The linearity of the system was measured over a wide exposure range at 90, 117, and 140 kVp with added Al filtration. System uniformity and reproducibility were established with an analysis of images from repeated exposures. The modulation transfer function (MTF) was evaluated using an established edge method. The noise power spectrum (NPS) and the detective quantum efficiency (DQE) of the system were evaluated at the three kilo-voltages over a range of exposures. Scatter fraction (SF) measurements were made using a posterior beam stop method and a geometrical chest phantom. The system demonstrated excellent linearity, but some structured nonuniformities. The 0.1 MTF values occurred between 3.3-3.5 mm(-1). The DQE(0.15) and DQE(2.5) were 0.21 and 0.07 at 90 kVp, 0.18 and 0.05 at 117 kVp, and 0.16 and 0.03 at 140 kVp, respectively. The system exhibited remarkably lower SFs compared to conventional full-field systems with anti-scatter grid, measuring 0.13 in the lungs and 0.43 in the mediastinum. The findings indicated that the slot-scan design provides marked scatter reduction leading to high effective DQE (DQEeff) of the system and reduced patient dose required to achieve high image quality.

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Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

September 2004

Volume

31

Issue

9

Start / End Page

2687 / 2698

Location

United States

Related Subject Headings

  • Technology, Radiologic
  • Technology Assessment, Biomedical
  • Sensitivity and Specificity
  • Scattering, Radiation
  • Reproducibility of Results
  • Radiography, Thoracic
  • Radiographic Image Enhancement
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Humans
 

Citation

APA
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ICMJE
MLA
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Samei, E., Saunders, R. S., Lo, J. Y., Dobbins, J. T., Jesneck, J. L., Floyd, C. E., & Ravin, C. E. (2004). Fundamental imaging characteristics of a slot-scan digital chest radiographic system. Med Phys, 31(9), 2687–2698. https://doi.org/10.1118/1.1783531
Samei, Ehsan, Robert S. Saunders, Joseph Y. Lo, James T. Dobbins, Jonathan L. Jesneck, Carey E. Floyd, and Carl E. Ravin. “Fundamental imaging characteristics of a slot-scan digital chest radiographic system.Med Phys 31, no. 9 (September 2004): 2687–98. https://doi.org/10.1118/1.1783531.
Samei E, Saunders RS, Lo JY, Dobbins JT, Jesneck JL, Floyd CE, et al. Fundamental imaging characteristics of a slot-scan digital chest radiographic system. Med Phys. 2004 Sep;31(9):2687–98.
Samei, Ehsan, et al. “Fundamental imaging characteristics of a slot-scan digital chest radiographic system.Med Phys, vol. 31, no. 9, Sept. 2004, pp. 2687–98. Pubmed, doi:10.1118/1.1783531.
Samei E, Saunders RS, Lo JY, Dobbins JT, Jesneck JL, Floyd CE, Ravin CE. Fundamental imaging characteristics of a slot-scan digital chest radiographic system. Med Phys. 2004 Sep;31(9):2687–2698.

Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

September 2004

Volume

31

Issue

9

Start / End Page

2687 / 2698

Location

United States

Related Subject Headings

  • Technology, Radiologic
  • Technology Assessment, Biomedical
  • Sensitivity and Specificity
  • Scattering, Radiation
  • Reproducibility of Results
  • Radiography, Thoracic
  • Radiographic Image Enhancement
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Humans