Which of the following tissues blocks sound waves?

What is the frequency of ultrasound?

Which medium has the greatest speed of wave propagation?

​What are the advantages and disadvantages of ultrasound imaging?

Which transducer has a field that is rectangular in shape?

​Which presentation mode the description applies to: The simplest type of presentation consists of displaying the instantaneous values of received ultrasound signals as a function of time. Used in ophthalmology.