Photoacoustic imaging through a cortical bone replica with anisotropic elasticity

Integrated System for Ultrasonic, Elasticity and Photoacoustic Imaging

Anisotropic Elasticity & Viscosity Deduced from Supersonic Shear Imaging in Muscle

INTRODUCTION Although the role of viscoelasticity in muscle mechanics is well recognized, methods for measurement in situ are limited. Recent advances in elastography have made possible the imaging of viscoelastic moduli within individual muscles [1, 2]. We have investigated a new approach, supersonic shear imaging (SSI), which combines high frame-rate (5kHz) ultrasound with acoustic radiation ...

Photoacoustic Imaging with Coherent Light

time pressure 2 s R T c  0. 2 P R P r  • Optical detection with a Fabry-Perot • Light wavelength : 670 nm • Ultrasound frequency : 0 ─ 20 MHz • Imaging depth : ~ 6 mm • Resolution : ~ 100 µm • Acquisition time : ~ 15 min Examples of applications: vascularization imaging

Investigating anisotropic elasticity using MR-Elastography combined with Diffusion Tensor Imaging: Validation using anisotropic and viscoelastic phantoms

Introduction: Magnetic Resonance Elastography (MRE) is a non-invasive imaging technique which is capable of quantifying soft tissue elasticity in vivo [1]. Most MRE studies have assumed isotropic mechanical properties although many soft tissues possess anisotropic mechanical properties due to their fibrous structure, for instance skeletal muscle or brain white matter. We propose a technique whi...

Analyzing the anisotropic Hooke's law for children's cortical bone.

Child cortical bone tissue is rarely studied because of the difficulty of obtaining samples. Yet the preparation and ultrasonic characterization of the small samples available, while challenging, is one of the most promising ways of obtaining information on the mechanical behavior of non-pathological children׳s bone. We investigated children׳s cortical bone obtained from chirurgical waste. 22 f...