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A phantom study on the positioning accuracy of the Novalis Body system.

Publication ,  Journal Article
Yan, H; Yin, F-F; Kim, JH
Published in: Med Phys
December 2003

A phantom study was conducted to investigate inherent positioning accuracy of an image-guided patient positioning system-the Novalis Body system for three-dimensional (3-D) conformal radiotherapy. This positioning system consists of two infrared (IR) cameras and one video camera and two kV x-ray imaging devices. The initial patient setup was guided by the IR camera system and the target localization was accomplished using the kV x-ray imaging system. In this study, the IR marker shift and phantom rotation were simulated and their effects on the positioning accuracy were examined by a Rando phantom. The effects of CT slice thickness and treatment sites on the positioning accuracy were tested. In addition, the internal target shift was simulated and its effect on the positioning accuracy was examined by a water tank. With the application of the Novalis Body system, the positioning error of the planned isocenter was significantly reduced. The experimental results with the simulated IR marker shifts indicated that the positioning errors of the planned isocenter were 0.6 +/- 0.3, 0.5 +/- 0.2, and 0.7 +/- 0.2 mm along the lateral, longitudinal, and vertical axes, respectively. The experimental results with the simulated phantom rotations indicated that the positioning errors of the planned isocenter were 0.6 +/- 0.3, 0.7 +/- 0.2, and 0.5 +/- 0.2 mm along the three axes, respectively. The experimental results with the simulated target shifts indicated that the positioning errors of the planned isocenter were 0.6 +/- 0.3, 0.7 +/- 0.2, and 0.5 +/- 0.2 mm along the three axes, respectively. On average, the positioning accuracy of 1 mm for the planned isocenter was achieved using the Novalis Body system.

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Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

December 2003

Volume

30

Issue

12

Start / End Page

3052 / 3060

Location

United States

Related Subject Headings

  • Video Recording
  • Tomography, X-Ray Computed
  • Surgery, Computer-Assisted
  • Subtraction Technique
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Radiotherapy, Conformal
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Motion
 

Citation

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ICMJE
MLA
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Yan, H., Yin, F.-F., & Kim, J. H. (2003). A phantom study on the positioning accuracy of the Novalis Body system. Med Phys, 30(12), 3052–3060. https://doi.org/10.1118/1.1626122
Yan, Hui, Fang-Fang Yin, and Jae Ho Kim. “A phantom study on the positioning accuracy of the Novalis Body system.Med Phys 30, no. 12 (December 2003): 3052–60. https://doi.org/10.1118/1.1626122.
Yan H, Yin F-F, Kim JH. A phantom study on the positioning accuracy of the Novalis Body system. Med Phys. 2003 Dec;30(12):3052–60.
Yan, Hui, et al. “A phantom study on the positioning accuracy of the Novalis Body system.Med Phys, vol. 30, no. 12, Dec. 2003, pp. 3052–60. Pubmed, doi:10.1118/1.1626122.
Yan H, Yin F-F, Kim JH. A phantom study on the positioning accuracy of the Novalis Body system. Med Phys. 2003 Dec;30(12):3052–3060.

Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

December 2003

Volume

30

Issue

12

Start / End Page

3052 / 3060

Location

United States

Related Subject Headings

  • Video Recording
  • Tomography, X-Ray Computed
  • Surgery, Computer-Assisted
  • Subtraction Technique
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Radiotherapy, Conformal
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Motion