Subject holding unit and photoacoustic apparatus
First Claim
1. A subject holding unit for a photoacoustic measuring apparatus comprising:
- a holding member configured to hold a subject; and
an optical absorber located in or on the holding member, wherein the optical absorber has a substantially spherical shape and a size determined based on a frequency band to be measured and associated with a size of the subject,wherein the optical absorber has a certain diameter D configured to meet the following conditions (1) to (3);
Dmin≤
D≤
max
(1),
Fcmax=0.66c/Dmin
(2), and
Fcmin=0.66c/Dmax
(3),where D, Dmin, Dmax represent a diameter of the optical absorber, its minimum value, and its maximum value, respectively;
c represents a sound speed in the subject;
Fcmin and Fcmax represent a minimum value and a maximum value of a peak frequency of an N-type waveform generated in the subject, respectively.
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Accused Products
Abstract
Provided is a photoacoustic apparatus capable of recognizing variation in reception characteristic among a plurality of receiving elements that detect an acoustic wave in the photoacoustic apparatus, with a simple configuration unique to the photoacoustic apparatus.
A photoacoustic apparatus includes a detecting unit including a plurality of receiving elements configured to detect an acoustic wave that is generated when an analyte is irradiated with light; a signal processing unit configured to acquire information about the inside of the analyte from a detected signal acquired from the detecting unit; an optical absorber configured to absorb the irradiation light; and a reception characteristic calculation unit configured to calculate reception characteristic information of the plurality of receiving elements on the basis of detected signals when the plurality of receiving elements receive an acoustic wave that is generated from the optical absorber.
9 Citations
26 Claims
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1. A subject holding unit for a photoacoustic measuring apparatus comprising:
-
a holding member configured to hold a subject; and an optical absorber located in or on the holding member, wherein the optical absorber has a substantially spherical shape and a size determined based on a frequency band to be measured and associated with a size of the subject, wherein the optical absorber has a certain diameter D configured to meet the following conditions (1) to (3);
Dmin≤
D≤
max
(1),
Fcmax=0.66c/Dmin
(2), and
Fcmin=0.66c/Dmax
(3),where D, Dmin, Dmax represent a diameter of the optical absorber, its minimum value, and its maximum value, respectively;
c represents a sound speed in the subject;
Fcmin and Fcmax represent a minimum value and a maximum value of a peak frequency of an N-type waveform generated in the subject, respectively.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A subject holding unit for a photoacoustic measuring apparatus comprising:
-
a holding member configured to hold a subject; and an optical absorber located in or on the holding member, wherein the optical absorber has a substantially spherical shape and a size determined based on a frequency band to be measured and associated with a size of the subject, wherein the optical absorber has a diameter D configured to satisfy the conditions (1), (5), and (6);
Dmin≤
D≤
Dmax
(1)
fmax=0.66c/Dmin
2), and
fmin=0.66c/Dmax
(3),where D, Dmin, and Dmax represent a diameter of the optical absorber, its minimum value, and its maximum value, respectively;
c represents a sound speed in the subject;
fmin and fmax represent a minimum value and a maximum value of a frequency band to be measured, respectively.- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification