5

1 oscillation per second or 1 cycle per second (cps)

frequency range employed in UTZ & therapeutic UTZ.

is pressure disturbances in the air that are detected by the human ear.

is a form of energy produced by the vibrations of matter.
- It cannot be transmitted at all without medium. 

when the first man-made sources of ultrasound appeared. 

Influences on the Transmission of Energy

occurs when the wave can't pass through the next density

is the bending of waves as a result of a change in the speed of a wave as it enters a medium with different density

occurs by the tissue collecting the wave's energy

Ultrasonic energy was first applied to the human body for medical purposes by ----- at the -----, Bethesda, Maryland in the late -----

US began to find application to industry as a non-destructive testing agent.

The first demonstration of color Doppler was by ----- who was involved in the early developments and medical use of doppler shifted ultrasonic energy

medical ultrasonography was used 1953 at ------ by cardiologist ----- and -----

they developed the idea of using this method (ultrasonography) in medicine.

The first successful measurement of heart activity was made on

it was when the method was used to generate an echo-encephalogram (ultrasonic probe of the brain).

is an ultrasound-based diagnostic imaging technique used to visualize muscles and internal organs, their size, structures, and possible pathologies or lesions.

involves exposing part of the body to high-frequency sound waves to produce pictures of the inside of the body.

is effective for imaging soft tissues of the body

Superficial structures such as muscles, tendons, testes, breast and the neonatal brain are imaged at a

Deeper structures such as liver and kidney are imaged at a