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:
Nov. 27, 1990
Filed:
Jul. 11, 1989
Nobuo Yamazaki, Ootawara, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
The present invention relates to a technique for setting a sample point in a pulse Doppler scan in a linear scan type ultrasonic diagnostic apparatus. A transmitting/receiving system for transmitting/receiving a linear scan of ultrasonic beams to/from a subject includes a linear scan probe, a pulser, a preamplifier, a receiving delay line and a summing circuit, as well as a sample point setter and a deflection angle setting circuit. The ultrasonic diagnostic apparatus includes a control system for fixing the initially set position of the sample point in the subject, when the deflection angle is reset by the deflection angle setting circuit, and for changing a set value of the sample point setting circuit so that the fixed position of the sample point coincides with a sample point of an ultrasonic beam to be propagated based on the reset deflection angle, and an image system having at least a D-mode processor for frequency-analyzing a received signal corresponding to the sample point to find a Doppler deviation frequency fd, and calculating bloodstream velocity data of the subject from the found doppler deviation frequency fd.