Title:
ACOUSTIC LENS FOR ULTRASONIC TRANSDUCER, ULTRASONIC TRANSDUCER, ULTRASONIC PROBE, AND ULTRASONIC DIAGNOSTIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/079906
Kind Code:
A1
Abstract:
This acoustic lens (7) for an ultrasonic transducer is to be disposed at a front end of an ultrasonic transducer (1), has a concave front surface (C1), and is formed of a base material (B) in which a plurality of fine particles (G) are dispersed. The degree of dispersion of the fine particles (G) becomes higher from the central part toward both ends in the elevation direction, thereby causing acoustic velocity to decrease from the central part toward both ends in the elevation direction.
Inventors:
OSAWA ATSUSHI (JP)
YOSHIHIRO TATSUYA (JP)
YOSHIHIRO TATSUYA (JP)
Application Number:
PCT/JP2020/039559
Publication Date:
April 29, 2021
Filing Date:
October 21, 2020
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00; A61B8/00
Foreign References:
| JP2019504700A | 2019-02-21 | |||
| JP2014004269A | 2014-01-16 | |||
| JPH0486100A | 1992-03-18 | |||
| JP2006288977A | 2006-10-26 | |||
| JPH0344394U | 1991-04-24 | |||
| JPH0344394U | 1991-04-24 |
Other References:
C. M. SAYERS ET AL.: "Ultrasonic properties of transducer backings", ULTRASONICS, 1984, pages 57 - 60, XP025824260, DOI: 10.1016/0041-624X(84)90022-2
ARAI, HIROTADA: "Coagulation Behavior of Suspended Particle in Liquid", RESEACH REPORTS NATIONAL INSTITUTE OF TECHNOLOGY, 2016, pages 101 - 107, XP055819705
See also references of EP 4050911A4
ARAI, HIROTADA: "Coagulation Behavior of Suspended Particle in Liquid", RESEACH REPORTS NATIONAL INSTITUTE OF TECHNOLOGY, 2016, pages 101 - 107, XP055819705
See also references of EP 4050911A4
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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