Acoustical phase conjugation and optical quasi-phase conjugate mirror in medical fields

Daniele Fargion

doi:10.1117/12.155708

3 September 1993 Acoustical phase conjugation and optical quasi-phase conjugate mirror in medical fields

Daniele Fargion

Proceedings Volume 1889, Holography, Interferometry, and Optical Pattern Recognition in Biomedicine III; (1993) https://doi.org/10.1117/12.155708
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

The coherent detection (and the consequent replay forward or backward in time emission) by an array of microphones (and loud speakers), in mutual phase, may mimic a dynamical acoustic hologram or a dynamical acoustic phase conjugate mirror (APCM). The ability of APCM to compensate distortions due to diffusing subjects (as part of living bodies) may in principle reverse in 3D detail (and with no hazard) the internal structure of anatomic components (tissue...) as well as absorbing ones (bones...). The resolution and the applications of APCM in medical inspections are discussed: megahertz frequencies are preferred. Anatomic subjects are generally optically opaque, but they are acoustically transparent. This is the reason to prefer APCM to optical PCM in medical as well as in geological inspections.

Citation Download Citation

Daniele Fargion "Acoustical phase conjugation and optical quasi-phase conjugate mirror in medical fields", Proc. SPIE 1889, Holography, Interferometry, and Optical Pattern Recognition in Biomedicine III, (3 September 1993); https://doi.org/10.1117/12.155708

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