Non-identifiability of the Rayleigh damping material model in Magnetic Resonance Elastography期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

Non-identifiability of the Rayleigh damping material model in Magnetic Resonance Elastography

Authors:	Andrii Y Petrov J Geoffrey Chase Mathieu Sellier Paul D Docherty

Institution:	1. Centre for Bioengineering, Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand;2. Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand

Abstract:	Magnetic Resonance Elastography (MRE) is an emerging imaging modality for quantifying soft tissue elasticity deduced from displacement measurements within the tissue obtained by phase sensitive Magnetic Resonance Imaging (MRI) techniques. MRE has potential to detect a range of pathologies, diseases and cancer formations, especially tumors. The mechanical model commonly used in MRE is linear viscoelasticity (VE). An alternative Rayleigh damping (RD) model for soft tissue attenuation is used with a subspace-based nonlinear inversion (SNLI) algorithm to reconstruct viscoelastic properties, energy attenuation mechanisms and concomitant damping behavior of the tissue-simulating phantoms. This research performs a thorough evaluation of the RD model in MRE focusing on unique identification of RD parameters, _μ_I $μ_{I}$ and _ρ_I $ρ_{I}$ .

Keywords:	Magnetic Resonance Elastography Nonlinear inversion Rayleigh damping Model identifiability Mechanical properties Medical imaging
本文献已被 ScienceDirect 等数据库收录！