Calculate the total attenuation to image the anterior edge of the liver at a depth of 2 cm using a 5 MHz transducer.

What form(s) of attenuation are occurring at the boundary indicated by the red arrow?

An ultrasound beam is directed at a large interface composed of bone and soft tissue.  The angle of incidence is 60°.  The sound beam moves from bone into soft tissue.  Assume the speed of sound in bone is 3080 m/s.  What is the effect on the sound beam.

Which of the following interactions with matter is independent of frequency?

Calculate the operating frequency for a CW transducer with a drive voltage of 8 MHz, a crystal thickness of 3 mm, a crystal diameter of 5 mm.  The propagation speed of PZT is 12 mm/usec.

CMUT devices are based on sound generation through ___________.

If the crystal diameter is 4 mm, what is the minimum distance a part 2 objects can be in the lateral plane and still distinguished as separate objects

Which of the following materials is a naturally occuring piezoelectric material?

Which of the following transducers will have the shortest focal depth if they all have the same crystal diameter?

Which of the following best describes the natural focus?