title: Calibration method for lumbosacral dimensions in wearable sensor system of lumbar alignment.
abstract: Anteflexion of the spine is essential for many physical activities in everyday life. However, this motion places the lumbar disks under heavy load due to changes in the shape of the lumbar spine and can lead to low back pain. With the aim of reducing low back pain, here we developed a wearable sensor system that can estimate lumbosacral alignment and lumbar load by measuring the shape of the lumbar skin when the lumbosacral alignment changes. In addition, we used this system to measure the parameters of anteflexion and studied the change in dimensions of the lumbar spine from changes in posture. By determining the dimensions of the lumbosacral spine on an X-ray image, a lumbosacral dimensions calibration method based on body surface area and height was developed. By using this method, lumbosacral alignment and lumbar load could be accurately estimated using the wearable sensor system.
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Tsuchiya
authors.forename: Takashi
authors.initials: T
authors.lastname: Kusaka
authors.forename: Takayuki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Matsuo
authors.forename: Makoto
authors.initials: M
authors.lastname: Oda
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Sasaki
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Kamishima
authors.forename: Masanori
authors.initials: M
authors.lastname: Yamanaka
mesh_terms: D001696:Biomechanical Phenomena; D002138:Calibration; D005260:Female; D006801:Humans; D017116:Low Back Pain / Q000473:pathology / Q000503:physiopathology; D008159:Lumbar Vertebrae / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000502:physiology*; D008161:Lumbosacral Region; D008297:Male; D018670:Monitoring, Ambulatory / Q000295:instrumentation*; D011187:Posture; D014057:Tomography, X-Ray Computed