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Time delay measurement for linac based treatment delivery in synchronized respiratory gating radiotherapy.

Publication ,  Journal Article
Jin, J-Y; Yin, F-F
Published in: Med Phys
May 2005

A time delay in a respiratory gating system could cause an unexpected phase mismatch for synchronized gating radiotherapy. This study presents a method of identifying and measuring the time delay in a gating system. Various port films were taken for a motion phantom at different gating window levels with a very narrow window size. The time delay for the gating system was determined by comparing the motion curve (the position of a moving object versus the gating time) measured in the port films to the motion curve determined by the video cameras. The measured time delay for a linac-based gating system was 0.17+/-0.03 s. This time delay could induce target missing if it was not properly taken into account for the synchronized gating radiotherapy. Measurement/verification of the time delay should be considered as an important part of the accepting/commissioning test before the clinical use of the gating system.

Duke Scholars

Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

May 2005

Volume

32

Issue

5

Start / End Page

1293 / 1296

Location

United States

Related Subject Headings

  • Time Factors
  • Respiratory Mechanics
  • Radiotherapy, Conformal
  • Radiotherapy Planning, Computer-Assisted
  • Radiation Dosage
  • Particle Accelerators
  • Nuclear Medicine & Medical Imaging
  • Movement
  • Humans
  • Film Dosimetry
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Jin, J.-Y., & Yin, F.-F. (2005). Time delay measurement for linac based treatment delivery in synchronized respiratory gating radiotherapy. Med Phys, 32(5), 1293–1296. https://doi.org/10.1118/1.1896452
Jin, Jian-Yue, and Fang-Fang Yin. “Time delay measurement for linac based treatment delivery in synchronized respiratory gating radiotherapy.Med Phys 32, no. 5 (May 2005): 1293–96. https://doi.org/10.1118/1.1896452.
Jin, Jian-Yue, and Fang-Fang Yin. “Time delay measurement for linac based treatment delivery in synchronized respiratory gating radiotherapy.Med Phys, vol. 32, no. 5, May 2005, pp. 1293–96. Pubmed, doi:10.1118/1.1896452.

Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

May 2005

Volume

32

Issue

5

Start / End Page

1293 / 1296

Location

United States

Related Subject Headings

  • Time Factors
  • Respiratory Mechanics
  • Radiotherapy, Conformal
  • Radiotherapy Planning, Computer-Assisted
  • Radiation Dosage
  • Particle Accelerators
  • Nuclear Medicine & Medical Imaging
  • Movement
  • Humans
  • Film Dosimetry