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has been cited by the following article:

• TITLE: Lung Stereotactic Body Radiotherapy Using an Abdominal Compression System, “Air-Bag System”

  AUTHORS: Hideharu Miura, Ryoong-Jin Oh, Norihisa Masai, Hiroya Shiomi, Kouichi Yamada, Toshihiko Inoue

  KEYWORDS: Stereotactic Body Radiotherapy, Lung Cancer, Tumor Motion, Abdominal Compression, Air-Bag System

  JOURNAL NAME: International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, Vol.3 No.2, May 20, 2014

  ABSTRACT: We investigated respiratory tumor motion in lung stereotactic body radiotherapy (SBRT) with use of the “Air-Bag System”. 114 patients underwent four-dimensional (4D) computed tomography (CT) from October 2010 to April 2012. Gross tumor volume (GTV) was 8.1 ± 11.0 cc (range 0.3 - 77.5 cc). The tumor site was the upper and middle lobes in 62 cases, and lower lobe in 52 cases. The Air-Bag SystemTM consists of an inelastic air bag connected to a second smaller elastic air bag. The inelastic air bag is placed between the patient’s body surface and a HipFix and is secured by pressure adjustment via the elastic air bag. To assess respiratory tumor motion, the centroid of the tumor position is measured in the left-right, anterior-posterior, and caudal-cranial directions using the iPlan RT DoseTM treatment planning system. Respiratory tumor motion vector for patients with upper/middle and lower lobe tumors was 3.0 ± 2.2 mm (range, 0.4 - 11.7 mm) and 6.5 ± 4.6 mm (range, 0.4 - 22.0 mm) respectively, with this difference being significant (p