Photoacoustic tomography as a method to estimate the optical fluence distribution in turbid media

被引:0
作者
Yip, Lawrence C. M. [1 ,2 ]
Rascevska, Elina [1 ,3 ]
Omidi, Parsa [3 ]
Carson, Jeffrey J. L. [1 ,2 ,3 ,4 ]
机构
[1] Lawson Hlth Res Inst, Imaging Program, 268 Grosvenor St, London, ON N6A 4V2, Canada
[2] Western Univ, Schulich Sch Med & Dent, Dept Med Biophys, 1151 Richmond St, London, ON N6A 3K7, Canada
[3] Western Univ, Sch Biomed Engn, 1151 Richmond St, London, ON N6A 3K7, Canada
[4] Western Univ, Schulich Sch Med & Dent, Dept Surg, 1151 Richmond St, London, ON N6A 3K7, Canada
基金
加拿大自然科学与工程研究理事会; 加拿大健康研究院;
关键词
LIGHT;
D O I
10.1364/BOE.496078
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Currently, there are no non-invasive experimental methods available for measuring optical fluence distributions in tissue. We present photoacoustic tomography (PAT) as a method to approximate the relative optical fluence distribution in a homogeneous optically scattering medium. Three-dimensional photoacoustic images were captured with a near-full view PAT scanner in phantoms with known optical absorption and scatter properties. Resultant 3D PAT images were compared to the expected optical fluence distributions from Monte Carlo simulations and diffusion theory using volumetric and shape analysis. Volumetric analysis of PAT images compared well with the optical fluence distributions from simulation. Dice similarity coefficients ranged from 51 to 82%. The reduced scattering coefficient estimated from PAT images compared well to estimates from simulations for values below 0.5 mm-1. Near full-view PAT has been found to be useful for estimating the optical fluence distribution in an optically scattering medium. Further development is needed to extend the measurement range.
引用
收藏
页码:5036 / 5046
页数:11
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