Endoscope system, control method, and computer readable recording medium

An endoscope system comprising:

• an ultrasound transducer configured to output an electrical signal by receiving an ultrasound wave;
• an ultrasound observation apparatus configured to generate an ultrasound image based on the electrical signal;
• a light source configured to supply illumination light to irradiate an inside of a subject;
• a light guide configured to guide the illumination light into the subject and scan an irradiation position of the illumination light into the subject along a specific trajectory according to an input drive signal;
• a driver configured to output the drive signal to the light guide;
• and
• a processor configured to control an operation of the driver, wherein
• the ultrasound transducer is configured to receive an ultrasound wave during a first period of the first period and a second period that are repeated, and
• the processor is configured to control the driver to output the drive signal to the light guide during the second period.

An endoscope system comprising:

• an insertion portion adapted to be inserted into a subject;
• an ultrasound transducer configured to output an electrical signal by receiving an ultrasound wave;
• an ultrasound observation apparatus configured to generate an ultrasound image based on the electrical signal;
• a light source configured to supply illumination light to irradiate an inside of the subject;
• a light guide configured to guide the illumination light into the subject and scan an irradiation position of the illumination light into the subject along a specific trajectory according to an input drive signal;
• a driver configured to output the drive signal to the light guide;
• and
• a processor configured to control an operation of the driver, wherein
• each of the ultrasound transducer and the light guide member is provided integrally with the insertion portion,
• the ultrasound observation apparatus is configured to generate the ultrasound image based on a signal in a specific frequency band included in the electrical signal, and
• the processor is configured to control the driver to output the drive signal having a drive center frequency outside the specific frequency band to the light guide.