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Continuous optoacoustic monitoring of hemoglobin concentration and hematocrit

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TLDR
In this article, an optoacoustic apparatus is described which includes a radiation source of pulsed radiation and a probe having a front face to be placed in contact with a tissue site of an animal body.
Abstract
An optoacoustic apparatus is disclosed which includes a radiation source of pulsed radiation and a probe having a front face to be placed in contact with a tissue site of an animal body. The probe further includes an optical fiber terminating at the surface of the front face of the probe and connected at their other end to a pulsed laser. The front face of the probe also has mounted therein or thereon a piezoelectric transducer for detecting an acoustic response to the radiation pulses connected to a processing unit which converts the transducer signal into a measure of hemoglobin concentration and/or hematocrit of blood.

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References
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Method and apparatus for chemical analysis

TL;DR: In this article, a method and apparatus for determining the presence of an analyte in a medium or the composition of a medium wherein a volume of material is irradiated with temporally-modulated electromagnetic energy at multiple wavelengths is presented.
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Optoacoustic imaging for medical diagnosis

TL;DR: In this paper, the authors describe a system that utilizes time-resolved measurement of profiles of laser-induced transient pressure (acoustic) waves, which are emitted by acoustic sources preferentially generated in absorbing tissues of diagnostic interest.
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Non-invasive blood component analyzer

TL;DR: A non-invasive blood component analyzer using spectrophotometry, with systole/diastole corrections for tissue absorbance, and with built-in monitoring of light path length to allow its accurate use in subjects with widely varying finger size and/or varying pulse amplitude.
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Spectral diagnosis of diseased tissue

TL;DR: In this article, a method and apparatus for diagnosing the condition of gastrointestinal tissue was proposed, which excites fluorophores within a portion of the gastrointestinal tissue with a laser to emit fluorescent radiation.
PatentDOI

Synthetic aperture ultrasound imaging system

TL;DR: In this article, an acoustical imaging system for producing high-resolution medical images was proposed, in which a set of receiver channels which number less than the number of transducers in the array were assigned to a selected portion of the plurality of the transducers.
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