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Television synchronization of a real time ultrasonic sector scanner
Author(s) -
Schuette William H.,
Shawker Thomas H.,
Whitehouse Willard C.
Publication year - 1978
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.1870060106
Subject(s) - scanner , ultrasonic sensor , frame rate , frame (networking) , synchronization (alternating current) , computer vision , image quality , professional video camera , high definition television , broadcasting (networking) , artificial intelligence , acoustics , computer science , optics , computer graphics (images) , image (mathematics) , telecommunications , physics , computer network , channel (broadcasting)
The interaction of the scan rates of ultrasonic scanning and television recording systems often causes portions of the resultant television image to be either over‐ or under‐scanned. This results in objectionable bright and dark sectors within the ultrasonic image on a television monitor during single‐frame playback. The usual method for dealing with this problem is to exchange time resolution for image quality when preparing pictures for analysis or presentation. Time resolution can be preserved by operating the ultrasonic scanner at a scan rate one‐half of the television frame rate and phase locking the ultrasonic scanner to the television system so that each angular scan of the ultrasonic system is initiated coincident with the beginning of each television frame.