Intrafraction verification of gated RapidArc by using beam-level kilovoltage X-ray images.

International Journal of Radiation Oncology, Biology, Physics
Ruijiang LiL Xing

Abstract

To verify the geometric accuracy of gated RapidArc treatment using kV images acquired during dose delivery. Twenty patients were treated using the gated RapidArc technique with a Varian TrueBeam STx linear accelerator. One to 7 metallic fiducial markers were implanted inside or near the tumor target before treatment simulation. For patient setup and treatment verification purposes, the internal target volume (ITV) was created, corresponding to each implanted marker. The gating signal was generated from the Real-time Position Management (RPM) system. At the beginning of each fraction, individualized respiratory gating amplitude thresholds were set based on fluoroscopic image guidance. During the treatment, we acquired kV images immediately before MV beam-on at every breathing cycle, using the on-board imaging system. After the treatment, all implanted markers were detected, and their 3-dimensional (3D) positions in the patient were estimated using software developed in-house. The distance from the marker to the corresponding ITV was calculated for each patient by averaging over all markers and all fractions. The average 3D distance between the markers and their ITVs was 0.8 ± 0.5 mm (range, 0-1.7 mm) and was 2.1 ± 1.2 mm at the ...Continue Reading

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Citations

Apr 6, 2013·Medical Physics·Kihwan ChoiRuijiang Li
Mar 13, 2014·International Journal of Radiation Oncology, Biology, Physics·Ruijiang LiKarl Bush
Aug 2, 2015·Practical Radiation Oncology·Amy S YuPeter G Maxim
Apr 23, 2014·International Journal of Radiation Oncology, Biology, Physics·Oliver BlanckJuergen Dunst
Oct 12, 2013·International Journal of Radiation Oncology, Biology, Physics·Ruijiang LiBilly W Loo
Dec 24, 2014·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Weigang HuZhen Zhang
Feb 25, 2014·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Nami UekiMasahiro Hiraoka
Nov 2, 2015·Medical Physics·Per Rugaard PoulsenCarsten Jensen
Apr 14, 2016·Journal of Applied Clinical Medical Physics·Margie A HuntPengpeng Zhang
Oct 17, 2014·World Journal of Gastroenterology : WJG·Wu-Zhe ZhangChuang-Zhen Chen
Feb 7, 2019·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·Daniel Zucca AparicioPedro Fernández Letón
May 12, 2017·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·Carmen Llacer-MoscardoPascal Fenoglietto

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