Ultrasonic transmission instrument and ultrasonic imaging device

Patent metadata

Field	Value
Publication number	US-11844587-B2
Application number	US-202016860556-A
Country	US
Kind code	B2
Filing date	Apr 28, 2020
Priority date	May 9, 2019
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

To provide an ultrasonic transmission instrument that can uniformly transmit ultrasonic waves in each direction around the instrument, even when the instrument is made of a material through which the ultrasonic waves cannot be transmitted. In an ultrasonic transmission instrument according to the invention, a light transmission member is disposed at an emission end of an optical waveguide, and an outer peripheral member covers an outer periphery of the light transmission member and is made of a light absorbing material.

First claim

What is claimed is:

1. An ultrasonic transmission instrument comprising:
an optical waveguide that is disposed inside the ultrasonic transmission instrument;
a light transmission member that is attached so as to cover an emission end of the optical waveguide from which light is emitted, wherein the light transmission member is configured to transmit at least a first part of the light emitted from the optical waveguide;
an opaque member configured to block at least a second part of the light from the optical waveguide, wherein the light transmission member is disposed between the emission end and the opaque member, and
an outer peripheral member that covers at least a part of an outer periphery of the light transmission member, wherein the outer peripheral member includes a light absorbing material that is configured to generate an ultrasonic wave by absorbing the light,
wherein the opaque member is disposed so as to cover at least another part of the light transmission member that is not covered by the outer peripheral member.

2. The ultrasonic transmission instrument according to claim 1 , wherein
the light transmission member has a cylindrical shape, and
the outer peripheral member covers at least a part of a side surface of the light transmission member.

3. The ultrasonic transmission instrument according to claim 1 , further comprising:
a light scattering member that scatters the light emitted from the optical waveguide inside the light transmission member.

4. The ultrasonic transmission instrument according to claim 3 ,
wherein the light scattering member is disposed at the emission end of the optical waveguide from which the light is emitted.

5. The ultrasonic transmission instrument according to claim 1 , further comprising:
a wire member,
wherein the light transmission member is disposed so as to cover at least a part of a side surface of the wire member.

6. The ultrasonic transmission instrument according to claim 1 , further comprising:
a wire member, wherein
the light transmission member is disposed so as to cover at least a part of a side surface of the wire member, and
the opaque member is attached to an end of the wire member.

7. The ultrasonic transmission instrument according to claim 1 , further comprising:
a hollow portion, wherein
the optical waveguide is disposed on an outer periphery of the hollow portion, and
the light transmission member is disposed on the outer periphery of the hollow portion.

8. The ultrasonic transmission instrument according to claim 1 , wherein
one end of the light transmission member has a curved surface,
the other end of the light transmission member is disposed at a position for receiving the light emitted from the emission end, and
the outer peripheral member covers at least a part of the curved surface.

9. The ultrasonic transmission instrument according to claim 8 , further comprising:
a light scattering member that scatters the light emitted from the optical waveguide inside the light transmission member.

10. The ultrasonic transmission instrument according to claim 1 ,
wherein the light absorbing material has a shape that is not symmetric with respect to a rotation operation of at least one angle.

11. The ultrasonic transmission instrument according to claim 10 ,
wherein the light absorbing material has a cylindrical shape.

12. The ultrasonic transmission instrument according to claim 10 ,
wherein a cross-sectional shape of the light absorbing material is rectangular.

13. An ultrasonic imaging device for generating an image of a subject using an ultrasonic wave, the ultrasonic imaging device comprising:
an ultrasonic transmission instrument configured to transmit the ultrasonic wave;
an ultrasonic probe comprising a plurality of elements, wherein the ultrasonic probe is configured to receive a reflected ultrasonic wave reflected from the subject;
an image generation unit configured to generate an ultrasonic image of the subject using the reflected ultrasonic wave received by the ultrasonic probe; and
a position estimation unit configured to estimate a position of the ultrasonic transmission instrument based on a difference between time points when each respective element among the plurality of elements receives the reflected ultrasonic wave,
wherein the ultrasonic transmission instrument includes:
an optical waveguide that is disposed inside the ultrasonic transmission instrument,
a light transmission member that is attached so as to cover an emission end of the optical waveguide from which light is emitted, wherein the light transmission member is configured to transmit at least a first part of the light emitted from the optical waveguide,
an opaque member configured to block at least a second part of the light from the optical waveguide, wherein the light transmission member is disposed between the emission end and the opaque member, and
an outer peripheral member that covers at least a part of an outer periphery of the light transmission member, wherein the outer peripheral member includes a light absorbing material that is configured to generate the ultrasonic wave by absorbing the light.

14. The ultrasonic imaging device according to claim 13 , wherein
the outer peripheral member has a shape that is not symmetric with respect to a rotation operation of at least one angle, and
the ultrasonic imaging device further includes an angle estimation unit that is configured to estimate an inclination of the ultrasonic transmission instrument based on the ultrasonic image generated by the image generation unit.

15. The ultrasonic imaging device according to claim 14 , wherein the angle estimation unit is configured to:
estimate the inclination of an image of the ultrasonic transmission instrument based on the ultrasonic image generated by the image generation unit, and
estimate an angle in an ultrasonic image plane.

16. The ultrasonic imaging device according to claim 14 ,
wherein the angle estimation unit is configured to:
measure a length of an image of the ultrasonic transmission instrument based on the ultrasonic image generated by the image generation unit, and
estimate an angle in a plane perpendicular to the ultrasonic image by obtaining a ratio of the length to a true length of the ultrasonic transmission instrument measured in advance.

Assignees

• Hitachi Ltd
• Fujifilm Healthcare Corp

Inventors

• Imai Ryo
• Tanaka Tomohiko

Classifications

• A61B5/0095 Primary

  by applying light and detecting acoustic waves, i.e. photoacoustic measurements · CPC title

• A61B8/0833

  involving detecting or locating foreign bodies or organic structures · CPC title

• B06B1/04

  operating with electromagnetism (dynamo-electric motors with vibrating magnet, armature or coil system H02K33/00) · CPC title

• G10K11/28

  using reflection, e.g. parabolic reflectors · CPC title

• B06B2201/76

  Medical, dental · CPC title