| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus or the like capable of providing a suitable ultrasonic image by enabling extraction of the reflex wave as the image subject with high precision. <P>SOLUTION: Interaction is carried out to differential sound component between the first basic wave of frequency f and the second basic wave of the frequency f<SB>2</SB>with the secondary high frequency wave to reinforce the secondary high frequency wave signal, and the reflex wave component as the image subject is extracted with high S/N ratio by using this. For instance, when the differential sound component is appeared to overlay with the secondary high frequency wave at the low frequency wave side of the secondary high frequency wave of the first basic wave, it establishes about f<SB>2</SB>= 2.8f. When the differential sound component is appeared to overlay with the secondary high frequency wave at the high frequency wave side of the secondary high frequency wave of the first basic wave, it establishes f<SB>2</SB>= 3.2f. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
