Ultrasonic diagnostic apparatus and signal processing apparatus
An ultrasonic diagnostic apparatus according to an embodiment includes filter processing circuitry and generation circuitry. The filter processing circuitry performs a filter process of removing a still or minute-moving signal on reflected wave signals of an ultrasonic wave transmitted a plurality of times in the same scanning line. The generation circuitry generates reflected wave data through a phasing addition process using reflected wave signal of each channel after the filter process performed by the filter processing circuitry.
1. An ultrasonic diagnostic apparatus, comprising:
control circuitry configured to cause an ultrasonic probe to perform ultrasonic wave scanning having a first transmission ultrasonic wave and a second transmission ultrasonic wave produced by inverting a phase of the first transmission ultrasonic wave;
filter processing circuitry configured to perform a filter process of adding a reflected wave signal of the first transmission ultrasonic wave and a reflected wave signal of the second transmission ultrasonic wave in a same scanning line in order to extract a reflected wave signal of a harmonic component, the reflected wave signals each corresponding to a channel, producing filtered signals; and
generation circuitry configured to generate reflected wave data through a phasing addition process of the filtered signals, wherein
the filter processing circuitry determines whether or not at least one of the reflected wave signal of the first transmission ultrasonic wave and the reflected wave signal of the second transmission ultrasonic wave received by each channel of the ultrasonic probe is saturated, in a case where it is determined that at least one is saturated, the filter processing circuitry outputs a value of 0 for the reflected wave signal of the harmonic component as an output signal, and in a case where it is not determined that at least one is saturated, the filter processing circuitry outputs the reflected wave signal of the harmonic component obtained by adding the reflected wave signal of the first transmission ultrasonic wave and the reflected wave signal of the second transmission ultrasonic wave and performing the extracting as an output signal, and
the generation circuitry generates the reflected wave data by using the output signal output by the filter processing circuitry.
2. The ultrasonic diagnostic apparatus according to claim 1 , further comprising control circuitry configured to cause an ultrasonic probe to perform ultrasonic wave scanning which transmits a plane wave.
3. The ultrasonic diagnostic apparatus according to claim 2 , wherein the control circuitry causes the ultrasonic probe to perform ultrasonic wave scanning which receives the reflected wave signals through a plurality of scanning lines.
4. A signal processing apparatus, comprising:
filter processing circuitry configured to, in ultrasonic wave scanning being performed by an ultrasonic probe and having a first transmission ultrasonic wave and a second transmission ultrasonic wave produced by inverting a phase of the first transmission ultrasonic wave, perform a filter process of adding a reflected wave signal of the first transmission ultrasonic wave and a reflected wave signal of the second transmission ultrasonic wave in a same scanning line in order to extract a reflected wave signal of a harmonic component, the reflected wave signals each corresponding to a channel, producing filtered signals; and
generation circuitry configured to generate reflected wave data through a phasing addition process of the filtered signals, wherein
the filter processing circuitry determines whether or not at least one of the reflected wave signal of the first transmission ultrasonic wave and the reflected wave signal of the second transmission ultrasonic wave received by each channel of the ultrasonic probe is saturated, in a case where it is determined that at least one is saturated, the filter processing circuitry outputs a value of 0 for the reflected wave signal of the harmonic component as an output signal, and in a case where it is not determined that at least one is saturated, the filter processing circuitry outputs the reflected wave signal of the harmonic component obtained by adding the reflected wave signal of the first transmission ultrasonic wave and the reflected wave signal of the second transmission ultrasonic wave and performing the extracting as an output signal, and
the generation circuitry generates the reflected wave data by using the output signal output by the filter processing circuitry.
5. The signal processing apparatus according to claim 4 , comprising:
the filter processing circuitry configured to determine whether at least one of the reflected wave signals is saturated wherein, in a case where one of the reflected wave signals is determined to be saturated, the filter processing circuitry excludes the one reflected wave signal from the produced filtered signals.