Adaptive calibration for object localization in turbid media with interfering diffuse photon density waves

被引：0

作者：

Chen, Yu ^{[1
,2
]}

Mu, Chenpeng ^{[1
]}

Intes, Xavier ^{[1
]}

Chance, Britton ^{[1
]}

机构：

[1] Dept. of Biophysics and Biochemistry, University of Pennsylvania, Philadelphia, PA 19104, United States

[2] Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, United States

来源：

Applied Optics | 2002年 / 41卷 / 34期

关键词：

Calibration - Density (optical) - Electromagnetic waves - Frequency modulation - Light absorption - Photons - Turbidity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The amplitude cancellation method that uses dual out-of-phase sources (a phased array system) can sensitively detect and locate small objects in turbid media. The balance of these two sources is crucial to the system's detection sensitivity and accuracy. We describe a convenient method with which to adaptively calibrate the amplitudes of the two sources at each scanning position by use of low-frequency modulation of the intensity of the in-phase and the antiphase sources. We achieve accurate localization ability of the phased array system by accounting for the influence of asymmetrical boundaries and the heterogeneous background absorption. Experimental data on human breast phantoms demonstrate that localization accuracy within several millimeters has been accomplished through this method. © 2002 Optical Society of America.

引用

页码：7325 / 7333