title: Computed Tomography and Magnetic Resonance Imaging for Longitudinal Characterization of Lung Structure Changes in a Yucatan Miniature Pig Silicosis Model.
abstract: Medical imaging is a rapidly advancing field enabling the repeated, noninvasive assessment of physiological structure and function. These beneficial characteristics can supplement studies in swine by mirroring the clinical functions of detection, diagnosis, and monitoring in humans. In addition, swine may serve as a human surrogate, facilitating the development and comparison of new imaging protocols for translation to humans. This study presents methods for pulmonary imaging developed for monitoring pulmonary disease initiation and progression in a pig exposure model with computed tomography and magnetic resonance imaging. In particular, a focus was placed on systematic processes, including positioning, image acquisition, and structured reporting to monitor longitudinal change. The image-based monitoring procedure was applied to 6 Yucatan miniature pigs. A subset of animals (n= 3) were injected with crystalline silica into the apical bronchial tree to induce silicosis. The methodology provided longitudinal monitoring and evidence of progressive lung disease while simultaneously allowing for a cross-modality comparative study highlighting the practical application of medical image data collection in swine. The integration of multimodality imaging with structured reporting allows for cross comparison of modalities, refinement of CT and MRI protocols, and consistently monitors potential areas of interest for guided biopsy and/or necropsy.
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA Department of Biomedical Engineering, University of Iowa, Iowa City, Iowa, USA.
authors.forename: Emily
authors.initials: E
authors.lastname: Hammond
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA Department of Biomedical Engineering, University of Iowa, Iowa City, Iowa, USA.
authors.forename: John D
authors.initials: JD
authors.lastname: Newell
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA Department of Biomedical Engineering, University of Iowa, Iowa City, Iowa, USA.
authors.forename: Samantha K N
authors.initials: SK
authors.lastname: Dilger
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA.
authors.forename: Nicholas
authors.initials: N
authors.lastname: Stoyles
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA.
authors.forename: John
authors.initials: J
authors.lastname: Morgan
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA.
authors.forename: Jered P
authors.initials: JP
authors.lastname: Sieren
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA.
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Thedens
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA Department of Biomedical Engineering, University of Iowa, Iowa City, Iowa, USA.
authors.forename: Eric A
authors.initials: EA
authors.lastname: Hoffman
authors.affiliation: Department of Pathology, University of Iowa, Iowa City, Iowa, USA.
authors.forename: David K
authors.initials: DK
authors.lastname: Meyerholz
authors.affiliation: Department of Radiology, University of Iowa, Iowa City, Iowa, USA Department of Biomedical Engineering, University of Iowa, Iowa City, Iowa, USA jessica-sieren@uiowa.edu.
authors.forename: Jessica C
authors.initials: JC
authors.lastname: Sieren
mesh_terms: D000818:Animals; D035843:Biomedical Research; D004195:Disease Models, Animal; D005260:Female; D006651:Histocytochemistry; D008168:Lung / Q000000981:diagnostic imaging* / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D012829:Silicosis / Q000000981:diagnostic imaging* / Q000473:pathology*; D013552:Swine; D013556:Swine, Miniature; D014057:Tomography, X-Ray Computed / Q000379:methods*
keywords: computed tomography (CT); longitudinal imaging; magnetic resonance imaging (MRI); medical imaging; pig models; silicosis; structured reporting
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