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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/850

Title: In vitro measurements of optical properties of porcine brain using a novel compact device
Authors: Yavari, N
Dam, JS
Antonsson, J
Wardell, K
Andersson-Engels, S
Keywords: Optical properties
Turbid media
Cash sensors
Integrating sphere
Porcine brain tissues
Issue Date: Sep-2005
Publisher: Peter Peregrinus Ltd
Citation: Yavari, N, et al. 2005. In vitro measurements of optical properties of porcine brain using a novel compact device. Medical, Biological Engineering and Computing, vol. 43(5), pp 658-666
Abstract: Knowledge of the optical properties of tissues can be applied in numerous medical and scientific fields, including cancer diagnostics and therapy. There are many different ways of determining the optical properties of turbid media. The paper describes measurements of the optical properties of porcine brain tissue using novel instrumentation for simultaneous absorption and scattering characterisation of small turbid samples. Integrating sphere measurements are widely used as a reference method for determination of the optical properties of relatively thin turbid samples. However, this technique is associated with bulky equipment, complicated measuring techniques, interference compensation techniques and inconvenient sample handling. It is believed that the sphere for some applications can be replaced by a new, compact device, called the combined angular and spatially resolved head sensor, to measure the optical properties of thin turbid samples. The results compare very well with data obtained with an integrating sphere for well-defined samples. The instrument was shown to be accurate to within 12% for mu (a) and 1% for mu'(s) in measurements of intralipid-ink samples. The corresponding variations of data were 17% and 2%, respectively. The reduced scattering coefficient for porcine white matter was measured to be 100 cm (-1) at 633 nm, and the value for coagulated brain tissue was 65 cm (-1). The corresponding absorption coefficients were 2 and 3 cm (-1), respectively.
Description: Copyright: 2005 Peter Peregrinus Ltd
URI: http://hdl.handle.net/10204/850
ISSN: 0140-0118
Appears in Collections:Laser physics and technology
General science, engineering & technology

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