alexa Measuring the elastic modulus of small tissue samples.
Physics

Physics

Journal of Lasers, Optics & Photonics

Author(s): Erkamp RQ, Wiggins P, Skovoroda AR, Emelianov SY, ODonnell M

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Abstract Independent measurements of the elastic modulus (Young's modulus) of tissue are necessary step in turning elasticity imaging into a clinical tool. A system capable of measuring the elastic modulus of small tissue samples was developed. The system tolerates the constraints of biological tissue, such as limited sample size (< or = 1.5 cm3) and imperfections in sample geometry. A known deformation is applied to the tissue sample while simultaneously measuring the resulting force. These measurements are then converted to an elastic modulus, where the conversion uses prior calibration of the system with plastisol samples of known Young's modulus. Accurate measurements have been obtained from 10 to 80 kPa, covering a wide range of tissue modulus values. In addition, the performance of the system was further investigated using finite element analysis. Finally, preliminary elasticity measurements on canine kidney samples are presented and discussed.
This article was published in Ultrason Imaging and referenced in Journal of Lasers, Optics & Photonics

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