Received data processing apparatus of photoacoustic tomography
First Claim
1. A received data processing apparatus, comprising:
- a plurality of conversion units that each perform digitization to digitize signals output from a plurality of acoustic wave detectors that receive acoustic waves generated in a specimen by absorption of light;
a plurality of first storage units each of which stores digital signals output from a respective one of said plurality of conversion units, only one of said first storage units receiving and storing digital signals from a given one of said conversion units;
a data composition unit that reads digital signals derived from the acoustic waves that originated from a target position in the specimen from said plurality of first storage units, reading from each of said first storage units the digital signal stored therein from said respective one of said conversion units, and adds digital signals read from said plurality of first storage units to compose data of the target position, andan image construction unit that constructs an image based on the composed data of the target position,wherein each of said plurality of first storage units stores at least the digital signals derived from acoustic waves generated by a single pulse of light, andwherein said data composition unit composes photoacoustic tomography data of a plurality of target positions distributed in a three-dimensional region of the specimen by repetitively, for each pixel or voxel, reading digital signals for the single pulse of light stored in each of said plurality of first storage units, based on travel times that are required for acoustic waves from each of the plurality of target positions to reach the detectors.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided a received data processing apparatus of photoacoustic tomography including a minimum constitution unit data composition unit that sequentially reads receiving digital signals from first storage units and composes minimum constitution unit data of the acoustic wave of the minimum constitution units by performing a delay-and-sum processing. A second storage unit stores the minimum constitution unit data of the entire region of the specimen, and an image construction unit constructs an image of the specimen based on the minimum constitution unit data stored in the second storage unit. A control unit sequentially stores the minimum constitution unit data calculated by the minimum constitution unit data composition unit in the second storage unit and reads the stored minimum constitution unit data of the entire region of the specimen to transmit the minimum constitution unit data to the image construction unit.
27 Citations
26 Claims
-
1. A received data processing apparatus, comprising:
-
a plurality of conversion units that each perform digitization to digitize signals output from a plurality of acoustic wave detectors that receive acoustic waves generated in a specimen by absorption of light; a plurality of first storage units each of which stores digital signals output from a respective one of said plurality of conversion units, only one of said first storage units receiving and storing digital signals from a given one of said conversion units; a data composition unit that reads digital signals derived from the acoustic waves that originated from a target position in the specimen from said plurality of first storage units, reading from each of said first storage units the digital signal stored therein from said respective one of said conversion units, and adds digital signals read from said plurality of first storage units to compose data of the target position, and an image construction unit that constructs an image based on the composed data of the target position, wherein each of said plurality of first storage units stores at least the digital signals derived from acoustic waves generated by a single pulse of light, and wherein said data composition unit composes photoacoustic tomography data of a plurality of target positions distributed in a three-dimensional region of the specimen by repetitively, for each pixel or voxel, reading digital signals for the single pulse of light stored in each of said plurality of first storage units, based on travel times that are required for acoustic waves from each of the plurality of target positions to reach the detectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A photoacoustic apparatus, comprising:
-
a light source; a plurality of acoustic wave detectors that convert acoustic waves generated in a specimen by absorption of light from said light source into received analog signals; a plurality of conversion units, each converting one of the received analog signals into a received digital signal; a plurality of first storage units that store the received digital signals output from said plurality of conversion units in time sequence; and a data composition unit that reads the received digital signals, that originated from a target position from among a plurality of target positions in a target region of the specimen, from each of said plurality of first storage units based on travel times that are required for acoustic waves from the target positions to reach said plurality of acoustic detectors, and composes target position data which is data of the acoustic waves on each of the plurality of target positions; and a second storage unit that stores the target position data of each of the plurality of target positions in the target region output from said data composition unit, wherein each of said plurality of first storage units stores the received digital signals derived from the acoustic waves generated by a single pulse of light from said light source, wherein said data composition unit composes the target position data of the plurality of the target positions in the target region by repetitively reading the received digital signals that are stored in said plurality of first storage units and are derived from the single pulse of light, and wherein said second storage unit stores data calculated by adding a plurality of target position data which correspond to a same target position, the plurality of target position data being derived from acoustic waves received in different reception regions. - View Dependent Claims (16, 17, 18, 19, 20)
-
-
21. A data processing apparatus for processing data acquired by a plurality of acoustic wave detectors, the apparatus comprising:
-
a plurality of A/D converters each configured to digitize a signal output from a respective one of a plurality of acoustic wave detectors that receive an acoustic wave generated from a specimen by irradiation with a pulse of light at an irradiation time, a target region of the specimen being divided into a plurality of voxels arranged in three dimensions and delay times, taken from each voxel to the plurality of acoustic wave detectors, being calculated; a plurality of storage units each configured to store the digitized signal acquired from a respective one of said plurality of A/D converters, a plurality of digitized signals, digitized by the plurality of A/D converters and corresponding to the acoustic wave generated from the specimen by irradiation with the pulse of light at the irradiation time, being stored by said plurality of storage units; a data composition unit configured to compose voxel data of each voxel by reading the plurality of digitized signals, stored by said plurality of the storage units, to be summed based on the delay times, the stored digitized signals being repetitively read for composing a plurality of voxel data corresponding to the plurality of voxels arranged in three dimensions; and an image construction unit that constructs an image based on the plurality of voxel data of the target region. - View Dependent Claims (22, 23, 24, 25, 26)
-
Specification