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Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room.

Publication ,  Journal Article
Lee, S-W; Jin, J-Y; Guan, H; Martin, F; Kim, JH; Yin, F-F
Published in: J Appl Clin Med Phys
January 13, 2008

INTRODUCTION: Although flat-panel based X-ray imaging has been well tested in diagnostic radiology, its use as an image-guided-radiotherapy (IGRT) system in a treatment room is new and requires systematic assessment. MATERIALS AND METHODS: BrainLab Novalis IGRT system was used for this study. It consists of two floor mounted kV X-ray tubes projecting obliquely into two flat-panel detectors mounted on the ceiling. The system automatically fuses the 2D localization images with 3D simulation CT image to provide positioning guidance. The following characteristics of the system were studied: (1) Coincidence of the isocenters between the IGRT and Linac; (2) Image quality; (3) Exposure; (4) Linearity, uniformity and repeatability. RESULTS: (1) Localization accuracy and coincidence of the isocenters between the IGRT and Linac was better than 1-mm. (2) The spatial resolution was quantified using the relative modulation-transfer-function with f50=0.7-0.9 lp/mm. The variation of contrast-noise-ratio with technical settings was measured. (3) The maximal exposure of an image was less than 95 mR. An empirical relation between the exposure and the X-ray technical setting was derived. (4) The linearity, uniformity and repeatability of the system generally meet the requirements. CONCLUSION: The system can be safely and reliably used as a target localization device.

Duke Scholars

Published In

J Appl Clin Med Phys

DOI

EISSN

1526-9914

Publication Date

January 13, 2008

Volume

9

Issue

1

Start / End Page

1 / 15

Location

United States

Related Subject Headings

  • X-Ray Intensifying Screens
  • Tomography, X-Ray Computed
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Radiotherapy, Conformal
  • Radiotherapy Dosage
  • Radiometry
  • Radiographic Image Interpretation, Computer-Assisted
  • Nuclear Medicine & Medical Imaging
  • Equipment Failure Analysis
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Lee, S.-W., Jin, J.-Y., Guan, H., Martin, F., Kim, J. H., & Yin, F.-F. (2008). Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room. J Appl Clin Med Phys, 9(1), 1–15. https://doi.org/10.1120/jacmp.v9i1.2318
Lee, Sung-Woo, Jian-Yue Jin, Huaiqun Guan, Flavious Martin, Jae Ho Kim, and Fang-Fang Yin. “Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room.J Appl Clin Med Phys 9, no. 1 (January 13, 2008): 1–15. https://doi.org/10.1120/jacmp.v9i1.2318.
Lee S-W, Jin J-Y, Guan H, Martin F, Kim JH, Yin F-F. Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room. J Appl Clin Med Phys. 2008 Jan 13;9(1):1–15.
Lee, Sung-Woo, et al. “Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room.J Appl Clin Med Phys, vol. 9, no. 1, Jan. 2008, pp. 1–15. Pubmed, doi:10.1120/jacmp.v9i1.2318.
Lee S-W, Jin J-Y, Guan H, Martin F, Kim JH, Yin F-F. Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room. J Appl Clin Med Phys. 2008 Jan 13;9(1):1–15.

Published In

J Appl Clin Med Phys

DOI

EISSN

1526-9914

Publication Date

January 13, 2008

Volume

9

Issue

1

Start / End Page

1 / 15

Location

United States

Related Subject Headings

  • X-Ray Intensifying Screens
  • Tomography, X-Ray Computed
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Radiotherapy, Conformal
  • Radiotherapy Dosage
  • Radiometry
  • Radiographic Image Interpretation, Computer-Assisted
  • Nuclear Medicine & Medical Imaging
  • Equipment Failure Analysis