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Noise characteristics for cone beam collimators: a comparison with parallel hole collimator.

Publication ,  Journal Article
Hahn, LJ; Jaszczak, RJ; Gullberg, GT; Floyd, CE; Manglos, SH; Greer, KL; Coleman, RE
Published in: Phys Med Biol
May 1988

In order to evaluate the properties of a cone beam (CB) collimator and three-dimensional filtered backprojection algorithm, the noise characteristics of this collimator configuration were determined and comparisons with a parallel hole (PH) collimator were made. Noise characteristics were evaluated using two approaches: the first consisted of assessing the magnitude of local random fluctuations in the reconstructed images, and the second consisted of assessing the noise texture in these images in the frequency domain by evaluating the noise power spectrum. Data used for these measurements were simulated using Monte Carlo models of SPECT systems equipped with cone beam and parallel hole collimators. Finally, to compare experimentally a specially designed high resolution CB collimator with a high resolution (HRES) PH collimator, measurements of a physical phantom were performed. Results of our studies show better noise magnitude for CB collimators; however, for CB collimators with short focal lengths (40-60 cm) the shape of %RMS noise distributions differs from slice to slice.

Duke Scholars

Published In

Phys Med Biol

DOI

ISSN

0031-9155

Publication Date

May 1988

Volume

33

Issue

5

Start / End Page

541 / 555

Location

England

Related Subject Headings

  • Tomography, Emission-Computed
  • Nuclear Medicine & Medical Imaging
  • Monte Carlo Method
  • Models, Structural
  • Computer Simulation
  • 5105 Medical and biological physics
  • 1103 Clinical Sciences
  • 0903 Biomedical Engineering
  • 0299 Other Physical Sciences
 

Citation

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Hahn, L. J., Jaszczak, R. J., Gullberg, G. T., Floyd, C. E., Manglos, S. H., Greer, K. L., & Coleman, R. E. (1988). Noise characteristics for cone beam collimators: a comparison with parallel hole collimator. Phys Med Biol, 33(5), 541–555. https://doi.org/10.1088/0031-9155/33/5/003
Hahn, L. J., R. J. Jaszczak, G. T. Gullberg, C. E. Floyd, S. H. Manglos, K. L. Greer, and R. E. Coleman. “Noise characteristics for cone beam collimators: a comparison with parallel hole collimator.Phys Med Biol 33, no. 5 (May 1988): 541–55. https://doi.org/10.1088/0031-9155/33/5/003.
Hahn LJ, Jaszczak RJ, Gullberg GT, Floyd CE, Manglos SH, Greer KL, et al. Noise characteristics for cone beam collimators: a comparison with parallel hole collimator. Phys Med Biol. 1988 May;33(5):541–55.
Hahn, L. J., et al. “Noise characteristics for cone beam collimators: a comparison with parallel hole collimator.Phys Med Biol, vol. 33, no. 5, May 1988, pp. 541–55. Pubmed, doi:10.1088/0031-9155/33/5/003.
Hahn LJ, Jaszczak RJ, Gullberg GT, Floyd CE, Manglos SH, Greer KL, Coleman RE. Noise characteristics for cone beam collimators: a comparison with parallel hole collimator. Phys Med Biol. 1988 May;33(5):541–555.
Journal cover image

Published In

Phys Med Biol

DOI

ISSN

0031-9155

Publication Date

May 1988

Volume

33

Issue

5

Start / End Page

541 / 555

Location

England

Related Subject Headings

  • Tomography, Emission-Computed
  • Nuclear Medicine & Medical Imaging
  • Monte Carlo Method
  • Models, Structural
  • Computer Simulation
  • 5105 Medical and biological physics
  • 1103 Clinical Sciences
  • 0903 Biomedical Engineering
  • 0299 Other Physical Sciences