Hiroyuki Watabe, Toshiya Nakaguchi Toshiyuki Natsume, Hiromichi Aoyama, Hiroshi Kawahira4,
Ahmed Afifi and Norimichi Tsumura
Chiba University, ,Japan
Journal of Signal Processing, Vol.15, No.4, pp.307-310(July, 2011).
Abstract
It is strongly required to determine the occurrence of infiltration between
the stomach and neighboring organs from only information prior to surgery
such as a com- puted tomography (CT) scan. In this study, we propose a
new quantitative index to indicate the infiltration of gastric cancer by
analyzing two CT images of the patient in different poses. The quantitative
index of infil-
tration is obtained by calculating the relative movement of the stomach
to the pancreas. To calculate this index, we perform three-step registration.
Next, a displacement map around the pancreas and stomach is derived. To
assist the diagnosis, the displacement map is illustrated with intensity
and superposed onto the CT image. The proposed method was applied to eleven
subjects and the efficacy of the proposed index was confirmed.
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