Electronic endoscope system for attenuating noise in ultrasound images using filter processing and pulse duration adjustment

Abstract

An electronic endoscope system that acquires an ultrasonic image, and the electronic endoscope system includes: an electronic endoscope including, an image sensor that captures an image of a biological tissue, and an ultrasonic probe that applies ultrasonic waves to the biological tissue to obtain an echo signal; a captured image processor including an image processing unit that processes an imaging signal output from the image sensor and generates a captured image; and an ultrasonic image processor including an ultrasonic image processing unit that processes the echo signal output from the ultrasonic probe and generates an ultrasonic image, a frequency band detection unit that detects a frequency band of a noise component included in the echo signal and equal to or higher than a preset threshold level, and a filter processing unit that performs filter processing on the echo signal such that a signal in the detected frequency band is attenuated.