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SU‐FF‐J‐12: HU and Dosimetric Comparison of Six Cone‐Beam CT Acquisition Techniques for Radiation Therapy Planning

Publication ,  Conference
Leeper, S; Yoo, S; Yin, FF
Published in: Medical Physics
January 1, 2009

Purpose: It has been shown that cone‐beam computed tomography (CBCT) can be used in dose calculation for treatment planning. This study investigates the HU and dosimetric properties of six CBCT techniques in comparison with conventional CT to determine which techniques are proper for planning. Method and Materials: HU of material disks in Catphan and HU profiles for homogeneous and inhomogeneous phantoms for six different CBCT techniques (Low‐Dose Head, Standard‐Dose Head, High Quality Head, Pelvis Spotlight, Pelvis, and Low‐Dose Thorax) were compared to CT images. Plans with a single photon beam based on CBCT techniques and conventional CT of phantoms were compared using dose values at the isocenter, isodose distributions, and dose volume histograms. Results: HU values of all the CBCT techniques are very close to those of CT in Catphan and in homogeneous phantoms except for Low‐Dose Thorax (LDTH) technique, which overestimates HU by 85. However, the LDTH CBCT showed the HU profile in the lung area matched well with the CT compared to the other five techniques. The dose distribution based on all CBCT techniques in the homogeneous phantoms matched well with the CT except for LDTH, which underestimated the dose. For the lung area, the LDTH dose distribution matched well with CT and the other CBCT techniques did not. For the spine area, the dose distribution of the Pelvis technique matched best with CT, but the other techniques matched relatively well with CT too except for LDTH. Conclusion: This study illustrates HU values and dose calculation based on six different CBCT techniques compared to conventional CT for the purpose of radiation therapy treatment planning. The dose calculation accuracy depends on combination of CBCT acquisition technique and treatment site. A CBCT technique should be properly selected for a treatment site if CBCT‐based dose calculation is to be performed. © 2009, American Association of Physicists in Medicine. All rights reserved.

Duke Scholars

Published In

Medical Physics

DOI

ISSN

0094-2405

Publication Date

January 1, 2009

Volume

36

Issue

6

Start / End Page

2477

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
Leeper, S., Yoo, S., & Yin, F. F. (2009). SU‐FF‐J‐12: HU and Dosimetric Comparison of Six Cone‐Beam CT Acquisition Techniques for Radiation Therapy Planning. In Medical Physics (Vol. 36, p. 2477). https://doi.org/10.1118/1.3181304
Leeper, S., S. Yoo, and F. F. Yin. “SU‐FF‐J‐12: HU and Dosimetric Comparison of Six Cone‐Beam CT Acquisition Techniques for Radiation Therapy Planning.” In Medical Physics, 36:2477, 2009. https://doi.org/10.1118/1.3181304.
Leeper, S., et al. “SU‐FF‐J‐12: HU and Dosimetric Comparison of Six Cone‐Beam CT Acquisition Techniques for Radiation Therapy Planning.” Medical Physics, vol. 36, no. 6, 2009, p. 2477. Scopus, doi:10.1118/1.3181304.

Published In

Medical Physics

DOI

ISSN

0094-2405

Publication Date

January 1, 2009

Volume

36

Issue

6

Start / End Page

2477

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