Title:
【発明の名称】音響走査方法及び装置
Document Type and Number:
Japanese Patent JP2807113
Kind Code:
B2
Abstract:
An acoustic scanning method and apparatus implemented by transmitting ultrasonic pressure waves and receiving return echoes on a set of spatially non-overlapping acoustic lines scanned along a transducer array (6) with the active acoustic lines shifted and steered so that each acoustic line originates at an arbitrary point (4a-4d) on and at an arbitrary angle to the face of the array. In a preferred embodiment, an extension of each acoustic line may also pass through a substantially common vertex (4a-4d) that is not on the face of the transducer array (6), but preferably behind it a selectable distance to provide an extended field of view. The extended field-of-view is defined by the selectively variable location of the common vertex (4a-4d) of the acoustic lines and the physical ends of the array, may use the entire transducer array in the near-field, has high quality resolution in both near and far fields, and may simultaneously transmit and receive two or more ultrasound beams from the same transducer aperture.
Inventors:
SAMYUERU EICHI MASURATSUKU
HYUU JII RAASEN
JOERU ESU CHAFUIN
HOORU II CHANDORAA
IAN EE GAARUTON
MEHEBABU ESU KARUMARI
HYUU JII RAASEN
JOERU ESU CHAFUIN
HOORU II CHANDORAA
IAN EE GAARUTON
MEHEBABU ESU KARUMARI
Application Number:
JP32357891A
Publication Date:
October 08, 1998
Filing Date:
February 12, 1991
Export Citation:
Assignee:
AKYUUSAN CORP
International Classes:
G01N29/26; A61B8/14; G01S7/52; G10K11/34; H04R17/00; (IPC1-7): A61B8/14
Domestic Patent References:
| JP5618850A | ||||
| JP5672857A | ||||
| JP62121356A | ||||
| JP5685332A | ||||
| JP6048732A | ||||
| JP5618770A |
Attorney, Agent or Firm:
Kazuo Sato (3 others)