Performance evaluation of a visual guidance patient-controlled respiratory gating system for respiratory-gated magnetic-resonance image-guided radiation therapy

Hyung Jin Choun, Jung in Kim, Chang Heon Choi, Seongmoon Jung, Hyeongmin Jin, Hong Gyun Wu, Eui Kyu Chie, Jong Min Park

Research output: Contribution to journalArticlepeer-review

Abstract

The performance of a visual guidance patient-controlled (VG-PC) respiratory gating system for magnetic-resonance (MR) image-guided radiation therapy (MR-IGRT) was evaluated through a clinical trial of patients with either lung or liver cancer. Patients can voluntarily control their respiration utilizing the VG-PC respiratory gating system. The system enables patients to view near-real-time cine planar MR images projected inside the bore of MR-IGRT systems or an external screen. Twenty patients who had received stereotactic ablative radiotherapy (SABR) for lung or liver cancer were prospectively selected for this study. Before the first treatment, comprehensive instruction on the VG-PC respiratory gating system was provided to the patients. Respiratory-gated MR-IGRT was performed for each patient with it in the first fraction and then without it in the second fraction. For both the fractions, the total treatment time, beam-off time owing to the respiratory gating, and number of beam-off events were analyzed. The average total treatment time, beam-off time, and number of beam-off events with the system were 1507.3 s, 679.5 s, and 185, respectively, and those without the system were 2023.7 s (p < 0.001), 1195.0 s (p < 0.001), and 380 times (p < 0.001), respectively. The VG-PC respiratory gating system improved treatment efficiency through a reduction in the beam-off time, the number of beam-off events, and consequently the total treatment time when performing respiratory-gated MR-IGRT for lung and liver SABR.

Original languageEnglish
Pages (from-to)809-816
Number of pages8
JournalPhysical and Engineering Sciences in Medicine
Volume45
Issue number3
DOIs
StatePublished - Sep 2022

Keywords

  • Breath-hold
  • Respiratory-gated radiotherapy
  • Treatment efficiency
  • Visual guidance

Fingerprint

Dive into the research topics of 'Performance evaluation of a visual guidance patient-controlled respiratory gating system for respiratory-gated magnetic-resonance image-guided radiation therapy'. Together they form a unique fingerprint.

Cite this