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TH‐C‐BRB‐01: Credentialing Results from a Spine Anthropomorphic Phantom

Publication ,  Conference
Molineu, A; Alvarez, P; Hernandez, N; Yin, F; Followill, D
Published in: Medical Physics
January 1, 2012

Purpose: To use an anthropomorphic spine phantom for dosimetric credentialing purposes in National Cancer Institute sponsored clinical trials. Methods: An anthropomorphic spine phantom that consists of lungs, a heart, an esophagus, a spinal cord, vertebrae and an abutting planning target volume (PTV) was sent to institutions interested in becoming credentialed for a radiosurgery protocol for spine metastasis. The phantom contained film in 2 planes and TLD in the PTV. Institutions were asked to fill the phantom with water, image the phantom, create an IMRT plan for the spinal SBRT, perform image‐guidance for the target localization, and to irradiate the phantom. They were also asked to perform the type of patient specific measurements that they would for an actual patient. TLD inside the PTV are required to be within ±7%. 85% of the analyzed area of film was required to pass a gamma analysis of ±5%/3 mm. Results: 125 phantom treatment plans from 88 institutions were analyzed since 2009. Only 83 (66%) of the phantom irradiations passed the acceptance criteria. Of the 42 failures, 14 of the irradiations failed both the TLD and film criteria, 27 failed only the film criteria and 1 failed only the TLD criteria. Six institutions passed the criteria after including the couch in the calculation. The most represented planning systems, machine manufacturers and algorithm types have the ability to pass the phantom. Both pencil beam and superposition/convolution type algorithms can adequately account for the bone heterogeneity present in this phantom. Conclusion: The phantom test is a critical credentialing tool to secure the high quality protocol study. Treatment couch attenuation could affect tumor dose delivery accuracy, especially in instances where the majority of the beams pass through the couch. Supported by PHS grants CA10953 and CA81647 (NCI, DHHS). The investigation was supported by PHS grants CA10953 and CA81647 (NCI, DHHS). © 2012, American Association of Physicists in Medicine. All rights reserved.

Duke Scholars

Published In

Medical Physics

DOI

ISSN

0094-2405

Publication Date

January 1, 2012

Volume

39

Issue

6

Start / End Page

3996

Related Subject Headings

  • Nuclear Medicine & Medical Imaging
  • 5105 Medical and biological physics
  • 4003 Biomedical engineering
  • 1112 Oncology and Carcinogenesis
  • 0903 Biomedical Engineering
  • 0299 Other Physical Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Molineu, A., Alvarez, P., Hernandez, N., Yin, F., & Followill, D. (2012). TH‐C‐BRB‐01: Credentialing Results from a Spine Anthropomorphic Phantom. In Medical Physics (Vol. 39, p. 3996). https://doi.org/10.1118/1.4736304
Molineu, A., P. Alvarez, N. Hernandez, F. Yin, and D. Followill. “TH‐C‐BRB‐01: Credentialing Results from a Spine Anthropomorphic Phantom.” In Medical Physics, 39:3996, 2012. https://doi.org/10.1118/1.4736304.
Molineu A, Alvarez P, Hernandez N, Yin F, Followill D. TH‐C‐BRB‐01: Credentialing Results from a Spine Anthropomorphic Phantom. In: Medical Physics. 2012. p. 3996.
Molineu, A., et al. “TH‐C‐BRB‐01: Credentialing Results from a Spine Anthropomorphic Phantom.” Medical Physics, vol. 39, no. 6, 2012, p. 3996. Scopus, doi:10.1118/1.4736304.
Molineu A, Alvarez P, Hernandez N, Yin F, Followill D. TH‐C‐BRB‐01: Credentialing Results from a Spine Anthropomorphic Phantom. Medical Physics. 2012. p. 3996.

Published In

Medical Physics

DOI

ISSN

0094-2405

Publication Date

January 1, 2012

Volume

39

Issue

6

Start / End Page

3996

Related Subject Headings

  • Nuclear Medicine & Medical Imaging
  • 5105 Medical and biological physics
  • 4003 Biomedical engineering
  • 1112 Oncology and Carcinogenesis
  • 0903 Biomedical Engineering
  • 0299 Other Physical Sciences