title: Path-loss estimation of wireless channels in capsule endoscopy from X-ray CT images.
abstract: The paper describes an estimation method of path-loss for capsule endoscopy using wireless communications to send images from digestive tract. This method is based on the use of a set of X-ray computer tomography (CT) images of the patient. In order to evaluate this method, we conducted a measurement of received signal strength (RSS) by introducing a signal generator (SG) in esophagus and duodenum of a participant. As a result of comparisons, the method provides estimates on path-loss for the participant with estimation errors of less than 6 dB in 75% measurement positions.
authors.affiliation: National Institute of Information and Communications Technology, 3-4 Hikarino-oka, Yokosuka 239–0847, Japan. takizawa@nict.go.jp
authors.forename: Kenichi
authors.initials: K
authors.lastname: Takizawa
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Hagiwara
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Hamaguchi
mesh_terms: D053705:Capsule Endoscopes; D004386:Duodenum / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000379:methods; D004947:Esophagus / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013686:Telemetry / Q000295:instrumentation*; D014057:Tomography, X-Ray Computed / Q000379:methods*