Patent ID: 9168024
Filing Date: 2015-10-27
Classification: A61B,G01S,G10K

Abstract:
1. An ultrasound diagnostic apparatus comprising: a transducer array; a transmission/reception circuit configured to perform transmission and reception of an ultrasonic beam from the transducer array toward a measurement region of a subject to obtain reception data; an image producer circuit configured to produce an ultrasound image on the basis of reception data obtained by the transmission/reception circuit; a display device configured to display the ultrasound image produced by the image producer circuit; an operating device configured to set multistage focus positions selected from a plurality of measurement depths within the measurement region through operation by an operator; a memory which in advance stores an inter-focus position distance table in which an allowable range of an inter-focus position distance for each measurement depth of the plurality of measurement depths is defined, wherein the allowable range for each measurement depth indicates the inter-focus position distance at which degradation of image quality of the ultrasound image due to an extreme increase in sound pressure in the vicinity of a focus position is not caused; a multistage focus position correction processor configured to read the allowable range for the measurement depth corresponding to the selected measurement depths of the multistage focus positions set through the operating device from the inter-focus position distance table in the memory, verify an inter-focus position distance between the selected measurement depths of the multistage focus positions set through the operating device is within the read allowable range, and automatically correct the multistage focus positions so as to be within the allowable range if the inter-focus position distance exceeds the allowable range; and a control circuit configured to control the transmission/reception circuit to perform transmission and reception of the ultrasonic beam on the basis of multistage focus positioning using the multistage focus positions verified or corrected by the multistage focus position correction processor.