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Associate Professor Kevin Diamond *McMaster University

Event Date: 
Monday, December 18, 2017 - 3:30pm to 4:30pm

Poly (Vinyl Alcohol) Cryogels:  Advances in Tissue-Mimicking Materials for Biomedical Optics

It is often challenging to find realistic tissue-mimicking phantoms with appropriate properties for imaging and quality assurance applications.  Ideally, such a phantom would look and behave like the tissue it was meant to simulate.  Poly (vinyl alcohol) (PVA) is a simple, biocompatible polymer that can be dissolved in water to create a hydrogel.  The hydrogel can then be crystallized into a rubbery material through repeated thermal cycling.  The properties of these cryogels (PVA-C) can be tuned so that suitable phantoms for ultrasound, MRI, x-ray, and optical imaging are possible.  In this presentation we will discuss how the optical properties of the PVA-C may be controlled through the formulation and thermal cycling.  The resulting cryogels scatter light like biological tissues, with the ability to adjust the absorption characteristics by adding appropriate chromophores.

Kevin Diamond is a senior medical physicist at the Juravinski Cancer Centre and an associate professor in the School of Interdisciplinary Science at McMaster University.  Dr. Diamond obtained his B.Sc. in Physics from the University of Waterloo in 1998 and a Ph.D. in Medical Physics from McMaster University in 2004.  After finishing his Ph.D., Dr. Diamond completed a medical physics residency at the Juravinski Cancer Centre. His research group is focused on developing PVA-C for use in applications related to biomedical optics and radiation therapy quality assurance.

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