Increased SNR in acousto-optic imaging via coded ultrasound transmission

Ahiad Levi, Sagi Monin, Evgeny Hahamovich, Aner Lev, Bruno G. Sfez, Amir Rosenthal

Research output: Contribution to journalArticlepeer-review

Abstract

Acousto-optic imaging (AOI) is a non-invasive method that uses acoustic modulation to map the light fluence inside biological tissue. In many AOI implementations, ultrasound pulses are used in a time-gated measurement to perform depth-resolved imaging without the need for mechanical scanning. However, to achieve high axial resolution, it is required that ultrasound pulses with few cycles are used, limiting the modulation strength. In this Letter, we develop a new approach to pulse-based AOI in which coded ultrasound transmission is used. In coded-transmission AOI (CT-AOI), one may achieve an axial resolution that corresponds to a single cycle, but with a signal-to-noise ratio (SNR) that scales as the square root of the number of cycles. Using CT-AOI with 79 cycles, we experimentally demonstrate over four-fold increase in SNR in comparison to a single-cycle AOI scheme.

Original languageEnglish
Pages (from-to)2858-2861
Number of pages4
JournalOptics Letters
Volume45
Issue number10
DOIs
StatePublished - 15 May 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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