Title:
ビームフォーミング用時間遅延及びアポダイゼーション値の敏速な分散型計算のための方法及び装置
Document Type and Number:
Japanese Patent JP4428477
Kind Code:
B2
Abstract:
An architecture in which a plurality of delay calculators are distributed throughout the beamformer. Each delay calculator provides beamforming delays and apodization values for a plurality of channels/elements. The delay calculators are initialized with element position coordinates. Then, while imaging, focal coordinates and steering angles are broadcast to all delay calculators. The delay calculator uses a cordic rotator to perform the aperture projections and calculate the hypotenuse. The cordic rotator performs successive coordinate transformations, in two dimensions, using coefficients that are simple powers of two. The resulting apodization values and time delays are then provided by a channel control bus to a plurality of channels.
Inventors:
Miller, Stephen Sea
Application Number:
JP2000592816A
Publication Date:
March 10, 2010
Filing Date:
December 06, 1999
Export Citation:
Assignee:
GENERAL ELECTRIC COMPANY
International Classes:
A61B8/00; G01S7/52; G01S7/523; G01S15/89; G06F7/544; G06F7/552; G06T1/00; G10K11/34; H04N7/18; H04R3/00; H04R17/00
Domestic Patent References:
| JP9318733A | ||||
| JP10293170A |
Foreign References:
| US5501219 |
Attorney, Agent or Firm:
Arakawa Satoshi