Poly(vinyl alcohol) gels for use as tissue phantoms in photoacousttc mammography

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Kharine, Alexei and Manohar, Srirang and Seeton, Rosalyn and Kolkman, Roy G.M. and Bolt, Rene A. and Steenbergen, Wiendelt and Mul de, Frits F.M. (2003) Poly(vinyl alcohol) gels for use as tissue phantoms in photoacousttc mammography. Physics in Medicine and Biology, 48 (3). pp. 357-370. ISSN 0031-9155

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Abstract:Materials for solid photoacoustic breast phantoms, based on poly(vinyl alcohol) hydrogels, are presented. Phantoms intended for use in photoacoustics must possess both optical and acoustic properties of tissue. To realize the optical properties of tissue, one approach was to optimize the number of freezing and thawing cycles of aqueous poly(vinyl alcohol) solutions, a procedure which increases the turbidity of the gel while rigidifying it. The second approach concentrated on forming a clear matrix of the rigid poly(vinyl alcohol) gel without any scattering, so that appropriate amounts of optical scatterers could be added at the time of formation, to tune the optical properties as per requirement. The relevant optical and acoustic properties of such samples were measured to be close to the average properties of human breast tissue. Tumour simulating gel samples of suitable absorption coefficient were created by adding appropriate quantities of dye at the time of formation; the samples were then cut into spheres. A breast phantom embedded with such 'tumours' was developed for studying the applicability of photoacoustics in mammography.
Item Type:Article
Copyright:© 2003 IOP Publishing Limited
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/40475
Official URL:http://dx.doi.org/10.1088/0031-9155/48/3/306
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Metis ID: 211031