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Minimizing image noise in on-board CT reconstruction using both kilovoltage and megavoltage beam projections.

Publication ,  Journal Article
Zhang, J; Yin, F-F
Published in: Med Phys
September 2007

We studied a recently proposed aggregated CT reconstruction technique which combines the complementary advantages of kilovoltage (kV) and megavoltage (MV) x-ray imaging. Various phantoms were imaged to study the effects of beam orientations and geometry of the imaging object on image quality of reconstructed CT. It was shown that the quality of aggregated CT was correlated with both kV and MV beam orientations and the degree of this correlation depended upon the geometry of the imaging object. The results indicated that the optimal orientations were those when kV beams pass through the thinner portion and MV beams pass through the thicker portion of the imaging object. A special preprocessing procedure was also developed to perform contrast conversions between kV and MV information prior to image reconstruction. The performance of two reconstruction methods, one filtered backprojection method and one iterative method, were compared. The effects of projection number, beam truncation, and contrast conversion on the CT image quality were investigated.

Duke Scholars

Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

September 2007

Volume

34

Issue

9

Start / End Page

3665 / 3673

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Radiographic Image Interpretation, Computer-Assisted
  • Phantoms, Imaging
  • Pelvis
  • Nuclear Medicine & Medical Imaging
  • Humans
  • Head
  • Artifacts
  • 5105 Medical and biological physics
  • 4003 Biomedical engineering
 

Citation

APA
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ICMJE
MLA
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Zhang, J., & Yin, F.-F. (2007). Minimizing image noise in on-board CT reconstruction using both kilovoltage and megavoltage beam projections. Med Phys, 34(9), 3665–3673. https://doi.org/10.1118/1.2768862
Zhang, Junan, and Fang-Fang Yin. “Minimizing image noise in on-board CT reconstruction using both kilovoltage and megavoltage beam projections.Med Phys 34, no. 9 (September 2007): 3665–73. https://doi.org/10.1118/1.2768862.
Zhang, Junan, and Fang-Fang Yin. “Minimizing image noise in on-board CT reconstruction using both kilovoltage and megavoltage beam projections.Med Phys, vol. 34, no. 9, Sept. 2007, pp. 3665–73. Pubmed, doi:10.1118/1.2768862.

Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

September 2007

Volume

34

Issue

9

Start / End Page

3665 / 3673

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Radiographic Image Interpretation, Computer-Assisted
  • Phantoms, Imaging
  • Pelvis
  • Nuclear Medicine & Medical Imaging
  • Humans
  • Head
  • Artifacts
  • 5105 Medical and biological physics
  • 4003 Biomedical engineering