title: Estimation of salient regions related to chronic gastritis using gastric X-ray images.
abstract: Since technical knowledge and a high degree of experience are necessary for diagnosis of chronic gastritis, computer-aided diagnosis (CAD) systems that analyze gastric X-ray images are desirable in the field of medicine. Therefore, a new method that estimates salient regions related to chronic gastritis/non-gastritis for supporting diagnosis is presented in this paper. In order to estimate salient regions related to chronic gastritis/non-gastritis, the proposed method monitors the distance between a target image feature and Support Vector Machine (SVM)-based hyperplane for its classification. Furthermore, our method realizes removal of the influence of regions outside the stomach by using positional relationships between the stomach and other organs. Consequently, since the proposed method successfully estimates salient regions of gastric X-ray images for which chronic gastritis and non-gastritis are unknown, visual support for inexperienced clinicians becomes feasible.
authors: Graduate School of Information Science and Technology, Hokkaido University, Kita-14, Nishi-9, Sapporo-shi 060-0814, Japan. Electronic address: togo@lmd.ist.hokudai.ac.jp.
authors: Ren
authors: R
authors: Togo
authors: Graduate School of Information Science and Technology, Hokkaido University, Kita-14, Nishi-9, Sapporo-shi 060-0814, Japan. Electronic address: ishihara@lmd.ist.hokudai.ac.jp.
authors: Kenta
authors: K
authors: Ishihara
authors: Graduate School of Information Science and Technology, Hokkaido University, Kita-14, Nishi-9, Sapporo-shi 060-0814, Japan. Electronic address: ogawa@lmd.ist.hokudai.ac.jp.
authors: Takahiro
authors: T
authors: Ogawa
authors: Graduate School of Information Science and Technology, Hokkaido University, Kita-14, Nishi-9, Sapporo-shi 060-0814, Japan. Electronic address: miki@ist.hokudai.ac.jp.
authors: Miki
authors: M
authors: Haseyama
mesh_terms: D002908:Chronic Disease; D005756:Gastritis / Q000000981:diagnostic imaging*; D016481:Helicobacter Infections / Q000000981:diagnostic imaging; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D011860:Radiography, Abdominal / Q000379:methods*; D012680:Sensitivity and Specificity; D060388:Support Vector Machine
keywords: Chronic gastritis; Computer-aided diagnosis; Helicobacter pylori; Radiology; Region estimation; Support vector machine