Ultrasonic transmission instrument and ultrasonic imaging device

An ultrasonic imaging device that images an image of a subject using an ultrasonic wave, the ultrasonic imaging device comprising:

• an ultrasonic transmission instrument that transmits the ultrasonic wave;
• an ultrasonic probe that receives a reflected ultrasonic wave reflected from the subject;
• an image generation unit that generates an ultrasonic image of the subject using the reflected ultrasonic wave received by the ultrasonic probe;
• and
• a position estimation unit that estimates a position of the ultrasonic transmission instrument, wherein
• the ultrasonic probe includes a plurality of elements for receiving the reflected ultrasonic wave reflected from the subject,
• the position estimation unit estimates the position of the ultrasonic transmission instrument using a difference between time points when the respective elements receive the reflected ultrasonic wave,
• the ultrasonic transmission instrument includes:
• an optical waveguide that is disposed inside the ultrasonic transmission instrument;
• a light transmission member that transmits at least a part of light emitted from the optical waveguide;
• and
• an outer peripheral member that covers at least a part of an outer periphery of the light transmission member, and
• wherein the outer peripheral member is made of a light absorbing material that generates an ultrasonic wave by absorbing the light and the outer peripheral member has a shape that is not symmetric with respect to a rotation operation of at least one angle, and.