Ultrasonic diagnostic apparatus

An ultrasonic diagnostic apparatus connected to a communication line via a wireless relay device and configured to communicate with an information terminal via the communication line and to transmit ultrasonic image information to the information terminal, the ultrasonic diagnostic apparatus comprising a processor configured by one or more programs of instructions to perform a method including steps comprising:

• performing group selection processing of selecting, in response to a selection operation by a user of the ultrasonic diagnostic apparatus, a shared group ID, which is one of a plurality of registered group IDs registered in advance;
• transmitting the shared group ID to the wireless relay device, only member devices associated with a group specified by the shared group ID being permitted to communicate through the wireless relay device with the ultrasonic diagnostic apparatus;
• and
• permitting, after the wireless relay device receives an affiliated group ID from the information terminal and determines that the affiliated group ID matches the shared group ID, wireless communication to be established between the ultrasonic diagnostic apparatus and the information terminal, and the ultrasonic image information to be transmitted to the information terminal.