Patent ID: 6685636
Filing Date: 2004-02-03
Classification: A61B

Abstract:
An ultrasonic tomography apparatus, comprising:ultrasonic transmitting means of transmitting an ultrasound to an object body; ultrasonic receiving means of receiving the ultrasound reflected from said object body and producing an ultrasonic signal; filtering means of extracting components of said ultrasonic signal in at least two different frequency bands; and image generating means of generating an ultrasonic tomogram of said object body based on said extracted ultrasonic signal component in a first frequency band and said extracted ultrasonic signal component in one or more second frequency bands, wherein said first frequency band centers on a frequency band at the time of said transmission, said second frequency band is shifted from the frequency band at the time of said transmission, and said second frequency band is set centered on a frequency for which a signal component is detected by scanning a predetermined bandwidth allowing for a potential Doppler shift from said first frequency band.