The Physics Principle of Ultrasonography

The Physics Principle of Ultrasonography

Watch to understand this 1.40 minutes video and answer the following questions.

You can pause, replay and take a note during listening to the video.

The maximum time allocation for each question is only 5 minutes.

Multiple Choice

This is the most important device in the ultrasonography system known as __________

• transducer

• transmitter

• ultrasound gel

• ultrasound monitor

Multiple Choice

Inside the transducer, there is an array of __________ crystals.

• aero-dynamic

• radiofrequency

• piezoelectric

• diamond

Multiple Choice

When electric signal is supply to the piezoelectric crystal, it will vibrate and produce high frequency sound wave or known as __________

• noise sound

• Doppler

• supersonic

• ultrasound

Multiple Choice

The piezoelectric crystal inside the transducer also can work in reverse when receives reflection ultrasound from the soft tissues organs. It can receive reflected ultrasound (echo) and change it to _________ signal.

• radiation

• magnetic

• electrical

• radio

Watch & listen again this video to strengthen your understanding. Then, ready to answer the next questions.

Poll

In physics, the reflection of sound/ultrasound is called _________

• echo

• frequency

• amplitude

• attenuation

Multiple Select

The electric signal that produce by the reflection sound/ultrasound (echo) will converts into points of brightness on the image that corresponding to the _____________ and the _________ (select TWO correct answers, then click submit)

• anatomical position of organs

• strength of the echo

• price of the ultrasound machine

• brand of the ultrasound machine

Multiple Choice

A complete image frame of the ultrasonography is called __________

• mammogram

• radiograph

• sonogram

• orthopantomogram

Fill in the Blanks

Real time motion of sonogram can be display because a complete image frame can be formed approximately

times per second. (type your answer)

Multiple Choice

The physics unit of the ultrasound (high frequency sound) is ______

• MHz

• kV

• T

• Joule

Multiple Choice

Which anatomy structure CANNOT be imaged using ultrasonography because of it absorb most of the ultrasound and not produce echo?

• kidney

• fetus

• liver

• bone

Listen the video again before you finish this lesson.