Autocorrelation of scattered laser light for ultrasound-modulated optical tomography in dense turbid media.
Based on measurement of the intensity autocorrelation function, a new method to determine the modulation depth of scattered laser light modulated by an ultrasonic wave in turbid media was applied to ultrasound-modulated optical tomography. Good signal-to-noise ratios and high sensitivities were demonstrated. Images of double optically absorbing objects buried in a highly optically scattering gel sample were obtained. The contrast was more than 10%, and the spatial resolution was approximately 2 mm.
Li
Hui
H
Optical Imaging Laboratory, Texas A&M University, College Station 77843-3120, USA.
Wang
Lihong V
LV
D006801:Humans; D007834:Lasers; D008962:Models, Theoretical; D055095:Optics and Photonics; D012542:Scattering, Radiation; D014463:Ultrasonography