FIELD: physics.
SUBSTANCE: first echo pulses of ultrasonic pulses transmitted to the measurement point are measured. A heating light beam (11) is transmitted to measurement point. Second echo pulses of ultrasonic pulses transmitted to the measurement point are measured. Optical absorption coefficient (µa) and/or optical scattering coefficient (µs) is determined from the first and second echo pulses.
EFFECT: reliable determination of at least one optical coefficient inside the object, particularly optical absorption coefficient in biological tissue.
12 cl, 5 dwg
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