公开(公告)号：JPH11173976A

公开(公告)日：1999-07-02

申请号：JP34298597

申请日：1997-12-12

Applicant: HAMAMATSU PHOTONICS KK

Inventor： OMAE ETSUKO ,  UEDA YUKIO ,  YAMASHITA YUTAKA

IPC: G01N21/17 ,  A61B5/145 ,  A61B10/00 ,  A61B5/14

Abstract: PROBLEM TO BE SOLVED: To provide an optical CT apparatus and an image reconstruction method in which the image of the distribution of absorption coefficients can be reconstructed with good accuracy and at a high speed. SOLUTION: The optical CT apparatus is constituted mainly of a container 12 whose inside is filled with an optical interface material 20, a light projection part which is composed of a light source 22 and an optical switch 24 and which projects light to the inside of the container 12, a light detection part which is composed of photodetectors 30 and shutters 32 and which detects light from the inside of the container 12 and of a computing/control part 14 which computes the spatial distribution of an absorption coefficient. The computing/ control part 14 has a function to find the spatial distribution of the absorption coefficient of a part to be measured on the basis of the comparison of an optical intensity signal measured by every photodetector 30 in a state that the optical interface material 20 is filled into the inside of the container 12 with a light signal measured by every photodetector 30 in a state that a part of the optical interface material 20 is replaced by the part to be measured.

公开(公告)号：JP2014137338A

公开(公告)日：2014-07-28

申请号：JP2013007418

申请日：2013-01-18

Applicant: Hamamatsu Photonics Kk ,  浜松ホトニクス株式会社

Inventor： UEDA YUKIO ,  YAMASHITA YUTAKA

IPC: G01N29/04 ,  G01N21/35

Abstract: PROBLEM TO BE SOLVED: To provide a cross-section image measuring device and a cross-section image measuring method capable of using both of an ultrasonic image measurement and an optical measurement with a simple configuration.SOLUTION: A cross-section image measuring device 1A is constituted of an ultrasonic image measuring device 10 having an ultrasonic probe 11 and for obtaining ultrasonic image data of a first cross-section of a measurement object S, a time resolution measuring device 15 having an optical incident probe 16 and a light emission probe 17 and for obtaining time resolution waveform data of emitted light propagated inside the measurement object S by pulse measuring light, and a measurement processing device 30 for performing data processing with respect to a cross-section measurement. The measurement processing device 30 includes: an ultrasonic image generation unit 31 for generating an ultrasonic image; an optical path image generation unit 32 for generating an optical path distribution image; and a cross-section image generation unit 35 for generating a synthesized cross-section image of the ultrasonic image and the optical path distribution image.

Abstract translation: 要解决的问题：提供一种能够以简单的结构使用超声波图像测量和光学测量两者的横截面图像测量装置和横截面图像测量方法。解决方案：横截面图像测量装置1A 由具有超声波探头11的超声波图像测量装置10构成，并且用于获得测量对象S的第一横截面的超声波图像数据;时间分辨率测量装置15，具有光入射探针16和发光探针17 并且用于通过脉冲测量光获得在测量对象S内传播的发射光的时间分辨率波形数据;以及用于对横截面测量进行数据处理的测量处理装置30。 测量处理装置30包括：超声波图像生成单元31，用于生成超声波图像; 用于产生光路分布图像的光路图像生成单元32; 以及用于产生超声波图像和光路分布图像的合成截面图像的截面图像生成单元35。

公开(公告)号：JPH09257694A

公开(公告)日：1997-10-03

申请号：JP781097

申请日：1997-01-20

Applicant: HAMAMATSU PHOTONICS KK

Inventor： OTA KAZUYOSHI ,  UEDA YUKIO

IPC: G01N21/27 ,  A61B10/00 ,  G01N21/17

Abstract: PROBLEM TO BE SOLVED: To provide an optical CT apparatus by which the tomogram of a sample can be reconstituted at high speed. SOLUTION: A computing part 4 expresses a sample M as an aggregate model in which a light absorber does not exist or which is composed of a plurality of uniform volume elements, and it computes, by a difference method, the optical density of transmitted light detected by an optical detection part 12 when projection light is projected on the aggregate model from a light source 10. In addition, the computing part computes, by the difference method, the optical density of transmitted light when the sample M is expressed as an aggregate model in which a light absorber exists and which is composed of a plurality of volume elements. Then, the ratio of the optical densities computed under the respective conditions is computed in advance as an influence degree. The ratio of the optical density of the transmitted light actually measured about the sample M to the optical density of the transmitted light computed in such a way that the light absorber does not exist and the influence degree are computed, feature data on the respective volume elements is found, and a tomogram is reconstituted.