Unlock instant, AI-driven research and patent intelligence for your innovation.

Subject information acquiring device and subject information acquiring method

A technology of the subject and equipment, applied in the directions of instruments, applications, echo tomography, etc., can solve the problem of inability to distinguish between the blood vessel image part and the background part, etc.

Inactive Publication Date: 2015-06-10
CANON KK
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In these imaging processes, when the obtained absorption coefficient is directly used in the comparison operation for calculating the ratio, the blood vessel image part and the background part cannot be distinguished, and therefore, as disclosed in Non-Patent Document 1, it is necessary to distinguish between the blood vessel image part and the background part. Distinguish between background parts and only process blood vessel image parts

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Subject information acquiring device and subject information acquiring method
  • Subject information acquiring device and subject information acquiring method
  • Subject information acquiring device and subject information acquiring method

Examples

Experimental program
Comparison scheme
Effect test

no. 2 example

[0077] Hereinafter, an embodiment will be described in which a process of extracting a real image is performed using the similarity distribution obtained in the [basic embodiment]. The entire device configuration is the same as in [Basic Embodiment], and the implementation method up to S4 for creating the similarity distribution is also the same, so differences will be described.

[0078] Figure 5 The internal configuration of the data processing device 6 is shown, in which an extraction processing unit 11 is arranged in addition to the image reconstruction processing unit 8 , template data 9 and matching processing unit 10 . The extraction processing unit 11 selects a voxel having a high similarity in the similarity distribution, and extracts only the initial acoustic pressure distribution of this voxel. In this embodiment, the initial acoustic pressure distribution used for this extraction process is used to extract the information distribution. More specifically, this pr...

no. 3 example

[0082] Instead of using the initial acoustic pressure distribution to calculate the similarity distribution and extract the initial acoustic pressure distribution as in [Basic Embodiment] and [Second Embodiment], an implementation of using the absorption coefficient distribution for calculation and extracting the similarity distribution will be described example.

[0083] A photoacoustic diagnostic device can calculate an absorption coefficient distribution from an initial acoustic pressure distribution. The resulting acoustic pressure P to be measured is represented by Equation 2.

[0084] P=Γ·μ a · φ Equation 2

[0085] Meanwhile, Γ refers to the Grueneisen constant of the optical absorber, μ a refers to the absorption coefficient of the optical absorber, and φ refers to the amount of light that has reached the optical absorber. Since Greenerson's constant can be considered constant, the resulting acoustic pressure is proportional to the product of the absorption coeffic...

no. 4 example

[0090] An example in which the present invention is used to extract the concentration of oxyhemoglobin (ie, oxygen saturation) in all hemoglobins will be described. Such as Figure 10 As shown, in the device configuration, the light source A14 and the light source B15 are arranged instead of the light source 1 of the [basic embodiment]. Light source A and light source B have different wavelengths, and light is irradiated at different timings. In addition, light source C, light source D, etc. having different wavelengths and timings may be added. By comparing the absorption coefficient distributions created by the various light sources, the oxygen saturation distribution can be calculated.

[0091] Figure 11 is a view showing the internal configuration of the data processing device 6 . The initial acoustic pressure distribution A created by the image reconstruction processing unit 8 from the acoustic wave from the light source A is converted into the absorption coefficient...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A subject information acquiring device has: an acoustic detector which receives an acoustic wave propagated in a subject and converts into an electrical signal; and a data processing device which generates a subject information distribution using the electrical signal, and the data processing device has a matching processing unit which acquires a similarity distribution by calculating a similarity between: template data indicating a relationship between a real image; and an artifact and the subject information distribution used as a matching information distribution, so that it is possible to provide a photoacoustic image forming diagnosing device which can distinguish between an image and a background even when the contrast is poor.

Description

technical field [0001] The invention relates to a method for obtaining object information and a method for obtaining object information. More specifically, the present invention relates to a technique utilizing the photoacoustic effect or a technique utilizing ultrasonic echoes. Background technique [0002] Subject information acquisition devices using X-rays and ultrasonic waves are used in many fields including medical fields that require non-destructive testing. In the field of subject information acquisition devices in medicine, physiological information (ie, functional information) about a living body can be effectively used to find diseased sites such as cancer, and thus imaging of functional information has been studied in recent years. Photoacoustic tomography (PAT), one of optical imaging techniques, is proposed as one of diagnostic methods using functional information. While X-ray diagnosis or ultrasonic diagnosis can acquire only morphological information about...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/00G01S15/89G06T11/00
CPCA61B5/0095A61B8/13A61B8/5269G01S15/8977A61B5/7203A61B5/7246G06T7/0012
Inventor 大石卓司
Owner CANON KK