JP2005152422A5 - - Google Patents

Claims (6)

A probe that transmits an ultrasonic beam into a subject and receives a reflected echo signal, an amplifying unit that amplifies the signal received by the probe and converts it into a luminance signal, and an image using the luminance signal An image creation unit that creates data and displays the data on the image display device, and a control unit,
The control unit includes an amplification factor correction unit for correcting the amplification factor of the amplification unit, and the amplification factor correction unit obtains a cumulative histogram curve of the luminance distribution of the image data, and determines on the obtained cumulative histogram curve. An ultrasonic diagnostic apparatus characterized in that an amplification factor correction value for shifting a luminance value corresponding to an accumulated frequency value to a predetermined reference luminance value is obtained by calculation, and the amplification factor of the amplification unit is corrected.   2. The ultrasonic diagnostic apparatus according to claim 1, further comprising accepting means for accepting an instruction to start correction from an operator, wherein the amplification factor correcting means performs amplification when the accepting means accepts an instruction to start correction. An ultrasonic diagnostic apparatus characterized by correcting a rate. A probe that transmits an ultrasonic beam into a subject within a predetermined scanning range and receives a reflected echo signal sequence, and a live signal that amplifies the received signal received by the probe at an amplification factor according to the depth of the living body. A body attenuation compensation unit, a storage unit that stores the amplified received signal for each reflected echo signal sequence, and a control unit,
The control unit includes an amplification factor correction means for correcting the amplification factor of the in vivo attenuation compensation unit for each depth,
The amplification factor correction unit includes a correction value determination unit that determines a correction value for increasing the amplification factor as the signal strength of the reception signal stored in the storage unit for each reflected echo signal train is small, and the storage The signal intensity variance of the received signal stored for each reflected echo signal sequence is calculated for each depth, and the correction value determining means determines the depth for which the variance value is smaller than a predetermined reference value. Weighting means for determining a weighting value for decreasing the correction value for each depth, and using the correction value weighted by the weighting value for each depth, the amplification factor of the in vivo attenuation compensator is determined. An ultrasonic diagnostic apparatus characterized by correcting.   The ultrasonic diagnostic apparatus according to claim 3, wherein the correction value determination unit obtains an average value of signal strengths of the received signals stored for each of the reflected echo signal sequences in the storage unit for each depth, and The difference between a standardized average value obtained by normalizing the value and a reference value is used as the correction value, and the weighting unit sets the depth where the variance is equal to or greater than the reference value to a weight value of 1, and the variance is smaller than the reference value An ultrasonic diagnostic apparatus characterized in that a depth is set to a weighting value smaller than 1, and the correction value is weighted. 5. The ultrasonic diagnostic apparatus according to claim 3, wherein an amplification unit that amplifies the entire signal received by the probe with a predetermined amplification factor and converts it to a luminance signal; and image data using the luminance signal. An image creating unit that creates and displays the image on the image display device;
The in-vivo attenuation compensation unit further amplifies the signal amplified by the amplification unit according to the depth, and the control unit corrects the amplification factor of the amplification unit. The gain correction means obtains a cumulative histogram curve of the luminance distribution of the image data, and shifts the luminance value corresponding to the cumulative frequency value on the obtained cumulative histogram curve to a predetermined reference luminance value. An ultrasonic diagnostic apparatus, wherein a correction value of an amplification factor is obtained by calculation, and the amplification factor of the amplification unit is corrected.   6. The ultrasonic diagnostic apparatus according to claim 3, further comprising accepting means for accepting an instruction to start correction from an operator, wherein the accepting means accepts an instruction to start correction. An ultrasonic diagnostic apparatus that corrects the amplification factor in the event of a failure.