US 12,402,864 B2
Ultrasound diagnostic apparatus
Takehiro Shimono, Chiba (JP); and Takahide Terada, Tokyo (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Healthcare Corporation, Kashiwa (JP)
Filed on Feb. 1, 2024, as Appl. No. 18/429,837.
Claims priority of application No. 2023-036277 (JP), filed on Mar. 9, 2023.
Prior Publication US 2024/0299013 A1, Sep. 12, 2024
Int. Cl. A61B 8/00 (2006.01); G01S 7/52 (2006.01)
CPC A61B 8/54 (2013.01) [G01S 7/52028 (2013.01); G01S 7/52031 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An ultrasound diagnostic apparatus comprising:
a transducer that transmits ultrasound to an inside of an examinee, receives a reflected wave from the inside of the examinee, and outputs a reception signal which is an electronic signal;
a band pass filter through which the reception signal, which is an electronic signal and is output from the transducer, passes;
a former that has a processor to form an ultrasound image based on the reception signal output from the band pass filter; and
a controller that dynamically changes a passband characteristic of the band pass filter in accordance with an increase in an observation point depth in the examinee,
wherein the passband characteristic of the band pass filter through which the electronic reception signal passes has a convex form, and the convex form has a peak as a highest point in a gain axis direction, and a width in a frequency axis direction, and the controller changes a peak position with respect to the width in accordance with the examinee at at least one observation point depth, and
an upper limit and a lower limit of the width at the at least one observation point depth are substantially maintained in a case in which the peak position is changed with respect to the width.