Diagnostic ultrasound apparatus

摘要

In ultrasound images, there are many stationary echoes in the region superficial to the deep region comprising the heart. In the present invention, a HPF processing unit (20) filters frame data by applying a high pass filter, the characteristics of which have been set according to the depth in the frame, on the frame data at said depth. The high pass filter can be achieved, for example, with a digital filter and the characteristics of the high pass filter are adjusted by the filter-setting unit (22) setting the filter coefficient of said digital filter. That is to say, the filter coefficient in the HPF processing unit (20) is controlled by the filter-setting unit (22) so that the deeper the region, the higher the offset level is set.

主权项

1. An ultrasonic diagnostic apparatus, comprising:
a probe that transmits and receives ultrasound; a transmitter/receiver section that controls the probe to thereby obtain a reception signal of ultrasound; a filter processing section that applies filter processing to frame data obtained based on the reception signal of ultrasound along an arrangement direction of a plurality of frames; and an image forming section that forms an ultrasonic image based on the frame data having been subjected to the filter processing, wherein the filter processing section applies a high-pass filter, having an offset level set in accordance with a depth within a frame, to frame data at the depth, thereby performing the filter processing, and wherein the filter processing section applies a high-pass filter having an offset level set to a higher level as the depth within a frame is greater and having characteristics closer to characteristics of an all-pass filter as the depth within a frame is greater.