%0 Journal Article
%T Lung Stereotactic Body Radiotherapy Using an Abdominal Compression System, ¡°Air-Bag System¡±
%A Hideharu Miura
%A Ryoong-Jin Oh
%A Norihisa Masai
%A Hiroya Shiomi
%A Kouichi Yamada
%A Toshihiko Inoue
%J International Journal of Medical Physics,Clinical Engineering and Radiation Oncology
%P 98-106
%@ 2168-5444
%D 2014
%I Scientific Research Publishing
%R 10.4236/ijmpcero.2014.32015
%X <p style=\"text-align:justify;\">
	<span style=\"font-size:10.0pt;font-family:;\" \"=\"\"><span style=\"font-family:Verdana;\">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 ¡À 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 System</span><sup><span style=\"font-family:Verdana;\">TM</span></sup><span style=\"font-family:Verdana;\"> 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 Dose</span><sup><span style=\"font-family:Verdana;\">TM</span></sup><span style=\"font-family:Verdana;\"> treatment planning system. Respiratory tumor motion vector for patients with
upper/middle and lower lobe tumors was 3.0 ¡À 2.2 mm (range, 0.4 - 11.7 mm) and
6.5 ¡À 4.6 mm (range, 0.4 - 22.0 mm) respectively, with this difference being
significant (p &lt; 0.05). Mean respiratory tumor motion for all patients was
0.9 ¡À 0.6 mm (range, 0.1 - 3.6 mm) in the left-right direction, 1.5 ¡À 1.1 mm (range,
0.1 - 5.7 mm) in the anterior-posterior direction, 4.1 ¡À 4.0 mm (range, 0.1 - 21.4
mm) in the caudal-cranial direction, and 4.7 ¡À 4.0 mm (range, 0.4 - 22.0 mm)
overall. The Air-Bag System is expected to be provided an effective reduction
in the motion of lung tumors.</span></span> 
</p>
%K Stereotactic Body Radiotherapy
%K Lung Cancer
%K Tumor Motion
%K Abdominal Compression
%K Air-Bag System
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=46042