title: Three-dimensional surface model analysis in the gastrointestinal tract.
abstract: The biomechanical changes during functional loading and unloading of the human gastrointestinal (GI) tract are not fully understood. GI function is usually studied by introducing probes in the GI lumen. Computer modeling offers a promising alternative approach in this regard, with the additional ability to predict regional stresses and strains in inaccessible locations. The tension and stress distributions in the GI tract are related to distensibility (tension-strain relationship) and smooth muscle tone. More knowledge on the tension and stress on the GI tract are needed to improve diagnosis of patients with gastrointestinal disorders. A modeling framework that can be used to integrate the physiological, anatomical and medical knowledge of the GI system has recently been developed. The 3-D anatomical model was constructed from digital images using ultrasonography, computer tomography (CT) or magnetic resonance imaging (MRI). Different mathematical algorithms were developed for surface analysis based on thin-walled structure and the finite element method was applied for the mucosa-folded three layered esophageal model analysis. The tools may be useful for studying the geometry and biomechanical properties of these organs in health and disease. These studies will serve to test the structure-function hypothesis of geometrically complex organs.
authors.affiliation: Center of Excellence in Visceral Biomechanics and Pain, Aalborg Hospital, Aalborg, Denmark.
authors.forename: Donghua
authors.initials: D
authors.lastname: Liao
authors.forename: Jens B
authors.initials: JB
authors.lastname: Frøkjaer
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
authors.forename: Jingbo
authors.initials: J
authors.lastname: Zhao
authors.forename: Asbjørn M
authors.initials: AM
authors.lastname: Drewes
authors.forename: Odd H
authors.initials: OH
authors.lastname: Gilja
authors.forename: Hans
authors.initials: H
authors.lastname: Gregersen
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004947:Esophagus / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology; D041981:Gastrointestinal Tract / Q000033:anatomy & histology* / Q000000981:diagnostic imaging* / Q000502:physiology; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D008953:Models, Anatomic; D008961:Models, Structural; D008962:Models, Theoretical; D009092:Mucous Membrane / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography