Ultrasound diagnosis apparatus
According to one embodiment, an ultrasound diagnosis apparatus is configured to generate ultrasound image data of a subject through an ultrasound probe. The ultrasound diagnosis apparatus includes a specifying unit, a transmission/reception condition change unit, and an image generator. The specifying unit specifies a characteristic site, which is included in a scanning range related to the ultrasound image data and has specific acoustic characteristics, based on three-dimensional image data of the subject generated in advance. The transmission/reception condition change unit changes transmission/reception conditions of ultrasound waves based on the acoustic characteristics of the characteristic site. The image generator generates the ultrasound image data based on changed transmission/reception conditions.
1. An ultrasound diagnosis apparatus configured to generate ultrasound image data of a subject through an ultrasound probe, the ultrasound diagnosis apparatus comprising processing circuitry configured to:
specify a characteristic site, which is included in a scanning range related to the ultrasound image data and has specific acoustic characteristics, based on three-dimensional image data of the subject generated in advance;
obtain a weighting coefficient based on an attenuation rate of the characteristic site;
obtain a delay time based on the acoustic characteristics of the characteristic site;
change reception conditions of ultrasound waves by multiplying each of reception signals, which has been delayed by the delay time, by the weighting coefficient with respect to each channel, and adding up the reception signals to obtain a reception signal that has been subjected to reception beam forming; and
generate the ultrasound image data based on the reception signal that has been subjected to reception beam forming under changed reception conditions.
2. The ultrasound diagnosis apparatus of claim 1 , further comprising a detector configured to detect either or both position and angle of the ultrasound probe,
wherein the processing circuitry is further configured to:
specify a new characteristic site based on the position and the angle of the ultrasound probe when the ultrasound probe has moved; and
change the reception conditions based on acoustic characteristics of the new characteristic site.
3. The ultrasound diagnosis apparatus of claim 1 , wherein the processing circuitry is further configured to:
determine whether to newly change the reception conditions based on contrast of the ultrasound image data; and
change the reception conditions when reception conditions are determined to be changed.
4. The ultrasound diagnosis apparatus of claim 1 , further comprising an operation unit configured to receive an input to newly change the reception conditions,
wherein the processing circuitry is further configured to change the reception conditions based on the input.
5. The ultrasound diagnosis apparatus of claim 1 , wherein
the ultrasound probe is a two-dimensional array probe, and
the processing circuitry is further configured to change the reception conditions related to azimuth direction and elevation direction of the two-dimensional array probe.
6. The ultrasound diagnosis apparatus of claim 1 , wherein the three-dimensional image data is generated by at least one of an X-ray CT apparatus, an MRI apparatus, an ultrasound diagnosis apparatus, and an X-ray diagnosis apparatus.
7. The ultrasound diagnosis apparatus of claim 1 , wherein the characteristic site is a site including bone.
8. The ultrasound diagnosis apparatus of claim 7 , wherein the site including bone is skull.
9. The ultrasound diagnosis apparatus of claim 1 , wherein
the processing circuitry is further configured to specify reference image data in the three-dimensional image data of the subject generated in advance, the reference image data corresponding to the scanning range of the ultrasound image data; and
the characteristic site in the ultrasound image data is specified based on the reference image data specified in the three-dimensional image.
10. The ultrasound diagnosis apparatus of claim 9 , wherein
the processing circuitry is further configured to extract the characteristic site from the reference image data, and
the characteristic site in the ultrasound image data is specified based on the characteristic site extracted from the reference image data.
11. The ultrasound diagnosis apparatus of claim 10 , wherein
the processing circuitry is further configured to specify a shape of the characteristic site in the ultrasound image data based on the extracted characteristic site, and
the reception conditions of ultrasound waves are changed by obtaining the weighting coefficient and delay time based on the shape and the acoustic characteristics of the characteristic site.
12. The ultrasound diagnosis apparatus of claim 1 , wherein
the ultrasound probe includes ultrasound transducers,
the processing circuitry is further configured to obtain for each of the ultrasound transducers a route between the ultrasound transducer and a focal point in the scanning range, based on the acoustic characteristics of the characteristic site; and
the reception conditions of ultrasound waves are changed by obtaining the weighting coefficient and delay time based on the route and the acoustic characteristics of the characteristic site.