ULTRASONIC DIAGNOSTIC DEVICE

PURPOSE:To always suitably display an ultrasonic image even when the number of ultrasonic scanning lines is changed by erasing the stored contents of a storing means when the number of the ultrasonic scanning lines is reduced at least. CONSTITUTION:When an input signal is Low, a freeze control circu...

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Bibliographic Details
Main Author ISHIMURA TOSHIAKI
Format Patent
LanguageEnglish
Published 26.11.1990
Subjects
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MEDICAL OR VETERINARY SCIENCE
PHYSICS
SURGERY
TESTING
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Summary:PURPOSE:To always suitably display an ultrasonic image even when the number of ultrasonic scanning lines is changed by erasing the stored contents of a storing means when the number of the ultrasonic scanning lines is reduced at least. CONSTITUTION:When an input signal is Low, a freeze control circuit 7 prohibits the reloading of a frame memory in a DSC 4 and when the input signal is High, the freeze is canceled. When the freeze is canceled, the freeze control circuit 7 once clears (erases) the memory in the DSC 4 and afterwards, it is started to reload the memory. When a scanning line changeover switch 8 is turned ON or OFF, namely, when the number of the ultrasonic scanning lines is switched, a freeze signal generating circuit 10 outputs a signal, which is made Low for a fixed period, through an OR circuit 11 to the freeze control circuit 7. Thus, the freeze control circuit 7 freezes the DSC 4 for the fixed period and afterwards, the freeze is canceled. Then, the contents of the memory in the DSC 4 are once cleared.
Bibliography:Application Number: JP19890108043