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    • 127. 发明授权
    • Image forming apparatus and image forming method
    • 图像形成装置及图像形成方法
    • US08998813B2
    • 2015-04-07
    • US13496760
    • 2010-11-09
    • Katsumi Nakagawa
    • Katsumi Nakagawa
    • A61B8/00A61B5/00A61B8/08G01S15/89
    • A61B5/0095A61B5/0073A61B5/7257A61B8/00A61B8/08G01S15/8977G01S15/8993
    • An image forming apparatus has acoustic transducers; and an image processing unit which calculates intensity of acoustic waves irradiated from regions inside a subject respectively by processing received signals, which are output from the acoustic transducers, by a Fourier-domain method. The image processing unit includes: a coefficient memory which stores coefficients computed in advance, the coefficient being a value determined only by a position of the acoustic transducer, position of the region and a time of receipt of the acoustic wave; a multiplier unit which multiplies the received signal of the acoustic transducer by the corresponding coefficient; and a voxel memory which accumulates multiplication results of the multiplier unit for each region.
    • 图像形成装置具有声学换能器; 以及图像处理单元,其通过以傅立叶域方式处理从声换能器输出的接收信号,分别计算从被摄体内的区域照射的声波的强度。 图像处理单元包括:系数存储器,其存储预先计算的系数,系数是仅由声换能器的位置确定的值,区域的位置和声波的接收时间; 乘法器单元,其将所述声换能器的接收信号乘以相应的系数; 以及累积每个区域的乘法器单元的相乘结果的体素存储器。