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Measuring apparatus

A measuring device and probe technology, applied in diagnostic recording/measurement, medical science, diagnosis, etc., can solve the problems of reconstructed images including artifacts, limited sound wave directionality, etc.

Inactive Publication Date: 2015-02-25
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, in the case of commonly used planar array probes, the directionality of the acoustic waves received by the probe is limited, leading to the problem of reconstructed images including artifacts

Method used

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Embodiment 1

[0036] Embodiment 1 of the present invention will be described below.

[0037] figure 1 is a schematic diagram showing the configuration of Embodiment 1 according to the present invention. The object measurement device described in this embodiment is a living body measurement device using photoacoustic tomography, which is a technique for reconstructing an image from a reception signal of an acoustic wave generated inside a subject by pulse irradiation of laser light .

[0038] Assume that the object in this embodiment is a human breast. The device performs imaging of blood vessels inside the breast using photoacoustic tomography.

[0039] exist figure 1 Here, the irradiation optical system 101 irradiates the subject 103 with light from a pulsed light source (not shown) that oscillates wavelengths in the near-infrared region with a predetermined light energy density distribution. The object 103 is held between two object holding plates 106 and 107 . The object holding pl...

Embodiment 2

[0066] Embodiment 2 of the present invention will be described below.

[0067] The object measuring device described in this embodiment is basically a living body measuring device using photoacoustic tomography similarly to Embodiment 1. Here, however, the illumination optics and probe are configured to be movable so that the object can be scanned, whereby images of a wider field of view can be produced.

[0068] Figure 5 is a schematic diagram showing the configuration of Embodiment 2 according to the present invention. The living body measuring device of this embodiment uses photoacoustic tomography technology to obtain information inside the object. That is, the device of the present embodiment receives acoustic waves generated inside the object by pulse irradiation of laser light, and reconstructs the received signal to obtain an image of the spatial distribution of absorption coefficient corresponding to the wavelength of the irradiated laser light.

[0069] Assume th...

Embodiment 3

[0092] Embodiment 3 of the present invention will be described below. Figure 8 is a diagram showing an outline of a main part of an apparatus according to Embodiment 3. The same number is given with the Figure 5 Components with the same functions as those of the device, and these same numbers will not be described again. The device of the present embodiment has a configuration in which a probe-side illuminating optical system 229 and a photodetector 228 are provided inside the probe-side bracket 222 of the device according to Embodiment 2. Similar to Embodiment 2, the device of this embodiment is a device for obtaining a reconstructed image based on the principle of photoacoustic tomography.

[0093] The device of the present embodiment irradiates the subject 203 with the irradiation light 227 from the irradiation optical system 229, and the photodetector 228 captures the timing of the light irradiation.

[0094] Arranging the illumination optical system 229 inside the pr...

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Abstract

A measuring apparatus is used, the apparatus including a probe having an element detecting an acoustic wave that has propagated through an object, an acoustic lens disposed between the probe and the object, and a signal processor obtaining object information from an electrical signal based on the acoustic wave detected by the element of the probe. The probe is disposed at a position where the element of the probe is made acoustically conjugate to a surface on a probe side of the object by the acoustic lens.

Description

technical field [0001] The invention relates to a measuring device. Background technique [0002] Measuring devices that generate image data of spatial distribution of optical properties inside objects such as living bodies using light irradiated from a light source such as laser light are actively being studied in the medical field. One of such measurement devices is a PAT device using photoacoustic tomography (PAT). In photoacoustic tomography, first, light is irradiated from a light source to a subject so that acoustic waves (typically, ultrasound) are generated from living tissue that has absorbed the energy of the light propagating and diffusing inside the subject. The generated acoustic waves are received by the probe, which refers to the acoustic wave detector, and the received signal is analyzed and processed mathematically to generate an image of the spatial distribution information associated with the optical properties inside the object. This imaging process is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
CPCA61B5/0095
Inventor 小林秀一福谷和彦
Owner CANON KK
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