title: Patient-specific biomechanical model for the prediction of lung motion from 4-D CT images.
abstract: This paper presents an approach to predict the deformation of the lungs and surrounding organs during respiration. The framework incorporates a computational model of the respiratory system, which comprises an anatomical model extracted from computed tomography (CT) images at end-expiration (EE), and a biomechanical model of the respiratory physiology, including the material behavior and interactions between organs. A personalization step is performed to automatically estimate patient-specific thoracic pressure, which drives the biomechanical model. The zone-wise pressure values are obtained by using a trust-region optimizer, where the estimated motion is compared to CT images at end-inspiration (EI). A detailed convergence analysis in terms of mesh resolution, time stepping and number of pressure zones on the surface of the thoracic cavity is carried out. The method is then tested on five public datasets. Results show that the model is able to predict the respiratory motion with an average landmark error of 3.40 ±1.0 mm over the entire respiratory cycle. The estimated 3-D lung motion may constitute as an advanced 3-D surrogate for more accurate medical image reconstruction and patient respiratory analysis.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Fuerst
authors.forename: Tommaso
authors.initials: T
authors.lastname: Mansi
authors.forename: Francois
authors.initials: F
authors.lastname: Carnis
authors.forename: Martin
authors.initials: M
authors.lastname: Salzle
authors.forename: Jingdan
authors.initials: J
authors.lastname: Zhang
authors.forename: Jerome
authors.initials: J
authors.lastname: Declerck
authors.forename: Thomas
authors.initials: T
authors.lastname: Boettger
authors.forename: John
authors.initials: J
authors.lastname: Bayouth
authors.forename: Nassir
authors.initials: N
authors.lastname: Navab
authors.forename: Ali
authors.initials: A
authors.lastname: Kamen
mesh_terms: D001696:Biomechanical Phenomena / Q000502:physiology*; D003198:Computer Simulation; D056973:Four-Dimensional Computed Tomography / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008168:Lung / Q000033:anatomy & histology / Q000502:physiology; D008954:Models, Biological; D009068:Movement; D057285:Precision Medicine / Q000379:methods; D012119:Respiration