Ultrasonic tomography apparatus and ultrasonic tomography method

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 a first partial ultrasonic tomogram of said object body based on said extracted ultrasonic signal component in a first frequency band and a second partial ultrasonic tomogram of said object body based on said 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.

An ultrasonic tomography method, comprising the steps of:

• transmitting an ultrasound to an object body;
• receiving the ultrasound reflected from said object body;
• extracting components of said ultrasound in at least two different frequency bands;
• and
• generating an ultrasonic tomogram of said object body based on said extracted ultrasonic component in a first frequency band and said extracted ultrasonic component in one or mare 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 frequency for which a signal component is detected by scanning a predetermined bandwidth allowing for a potential Doppler shift from said first frequency band.

An ultrasonic tomography method, comprising the steps of:

• transmitting an ultrasound to an object body;
• receiving the ultrasound reflected from said object body;
• extracting components of said ultrasonic in at least two different frequency bands;
• generating a first partial ultrasonic tomogram of said object body based on said extracted ultrasonic signal component in a first frequency band;
• generating a second partial ultrasonic tomogram of said object body based on 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.