Detection of inhomogeneities with ultrasound tagging of light

Erel Granot, Aner Lev, Zvi Kotler, Bruno G. Sfez, Haim Taitelbaum

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


Ultrasound modulated light for optical tomography is very useful, since it can provide three-dimensional data with minimal mathematical processing. Although several experimental studies have shown the potential of this method, the link between the ultrasound location and the modulated signal intensity at the detector is not yet fully understood. We derive an analytical formula relating the position of the ultrasound transducer and the optical signal at the detector. We also derive an expression for the signal-to-shot-noise ratio as a function of the transducer position. We show that in certain conditions this ratio is only slowly decreasing as a function of the light penetration depth, which makes this technique attractive for optical tomography.

Original languageEnglish
Pages (from-to)1962-1967
Number of pages6
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number8
StatePublished - Aug 2001


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