Method and apparatus for frequency encoded ultrasound-modulated optical tomography of dense turbid media
Abstract
An apparatus (10) for frequency encoded ultrasound modulated optical tomography is provided. A function generator (12) produces a frequency sweep signal which is applied to an ultrasonic transducer (20). The ultrasonic transducer (20) produces ultrasonic wave (25) in a turbid medium (21). Coherent light from a laser (22) is passed through turbid medium (21) where it is modulated by the ultrasonic wave (25). A photomultiplier tube (24) detects the light which passes through the turbid medium (21). The signal from the photomultiplier tube (24) is fed to an oscilloscope (30) and then to a computer (32) where differences in light intensity at different frequencies can determine the location of objects in the turbid medium (21).
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Citation
Wang, Lihong (2000). Method and apparatus for frequency encoded ultrasound-modulated optical tomography of dense turbid media. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from https : / /hdl .handle .net /1969 .1 /176635.