Title:
【発明の名称】アレイ型画像システムにおけるデジタル信号集束のための帯域幅サンプリング方式
Document Type and Number:
Japanese Patent JP2728183
Kind Code:
B2
Abstract:
The present invention relates to an ultrasonic array imaging system for focusing ultrasonic signals which are reflected from an object (13) to be imaged and received by an array transducer (40). A digital focusing method and system in accordance with the present invention solve the difficulty of envelope detection from digital data which is sampled to a high frequency in digital-processing and focusing of ultrasonic signals, using both analytic signal sampling and quadrature sampling among bandwidth sampling methods. Transducer elements (1-n) are connected to phase transformers (PDN1-PDNn) within a band transformer (41), the output of which is again connected to clock-sampled A/D converting unit (42) and stored in memory unit (44). These data are added in adding unit (45, 46, 47) and coupled to envelope detector (48).
Inventors:
CHAN SEO HO
PAKU SON BAI
PAKU SON BAI
Application Number:
JP50049095A
Publication Date:
March 18, 1998
Filing Date:
May 23, 1994
Export Citation:
Assignee:
MEDEISON CO LTD
International Classes:
G01N29/04; A61B8/00; G01N29/44; G01S7/52; G01S7/523; G06T1/00; G10K11/34; (IPC1-7): G01S7/523; A61B8/00; G01N29/22
Domestic Patent References:
| JP61288604A | ||||
| JP5990170A | ||||
| JP3173549A | ||||
| JP63149764A | ||||
| JP728202B2 |
Attorney, Agent or Firm:
Yasunori Otsuka (1 person outside)