The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2000
Filed:
Jul. 17, 1998
Applicant:
Inventors:
Takuya Sasaki, Otawara, JP;
Ryoichi Kanda, Otawara, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
600453 ; 600454 ;
Abstract
A technique is disclosed for accurately tracing a maximum or minimum frequency in each of Doppler-shifted frequency spectra arranged in a sequential order of time on the time axis as an M-mode Doppler image. The maximum or minimum frequency is picked up by thresholding and hence the trace accuracy depends on a threshold. The threshold is determined based on the average brightness of a sample region in which noise is dominant. Therefore, the capability of discriminating between signal and noise components improves, allowing the trace accuracy to be improved.