Ultrasound diagnostic apparatus and signal processing method thereof
First Claim
1. An ultrasound diagnostic apparatus comprising:
- an ultrasound probe including a plurality of ultrasound transducers for transmitting ultrasound waves to an object and receiving ultrasound waves reflected by the object to output an ultrasound detection signal;
a region-of-interest setting device which sets a region of interest within the object;
a transmission focus instruction device which causes the ultrasound probe to bring the ultrasound waves into transmission focus on the region of interest;
a set sound velocity specification device which specifies a plurality of set sound velocities used to perform reception focusing on the ultrasound detection signal from the region of interest;
a focus index calculation device which calculates the focus index of the ultrasound detection signal for each of the plurality of set sound velocities by performing the reception focusing; and
an ambient sound velocity determination device which determines the ambient sound velocity of the region of interest on the basis of the focus index for each of the plurality of set sound velocities.
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Abstract
The presently disclosed subject matter is intended to correctly determine an ambient sound velocity at each level of pixels or line images constituting an ultrasound image, and construct a high-precision ultrasound image. A region-of-interest setting unit sets a region of interest on an ultrasound image. A transmission focus control unit gives a transmission focus instruction, so that a transmitting circuit performs transmission focusing on the region of interest. A set sound velocity specification unit specifies a set sound velocity used to perform reception focusing on RF data. A focus index calculation unit performs reception focusing on the RF data for each of a plurality of set sound velocities to calculate the focus index of the RF data. An ambient sound velocity determination unit determines the ambient sound velocity of the region of interest on the basis of the focus index for each of the plurality of set sound velocities.
25 Citations
16 Claims
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1. An ultrasound diagnostic apparatus comprising:
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an ultrasound probe including a plurality of ultrasound transducers for transmitting ultrasound waves to an object and receiving ultrasound waves reflected by the object to output an ultrasound detection signal; a region-of-interest setting device which sets a region of interest within the object; a transmission focus instruction device which causes the ultrasound probe to bring the ultrasound waves into transmission focus on the region of interest; a set sound velocity specification device which specifies a plurality of set sound velocities used to perform reception focusing on the ultrasound detection signal from the region of interest; a focus index calculation device which calculates the focus index of the ultrasound detection signal for each of the plurality of set sound velocities by performing the reception focusing; and an ambient sound velocity determination device which determines the ambient sound velocity of the region of interest on the basis of the focus index for each of the plurality of set sound velocities. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A signal processing method of an ultrasound diagnostic apparatus, comprising:
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a region-of-interest setting step of setting a region of interest within an object; a transmission focus instruction step of causing an ultrasound probe to bring ultrasound waves into transmission focus on the region of interest; a set sound velocity specification step of specifying a plurality of set sound velocities used to perform reception focusing on an ultrasound detection signal from the region of interest; a focus index calculation step of calculating the focus index of the ultrasound detection signal for each of the plurality of set sound velocities by performing the reception focusing; and an ambient sound velocity determination step of determining the ambient sound velocity of the region of interest on the basis of the focus index for each of the plurality of set sound velocities. - View Dependent Claims (15, 16)
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Specification