Ultrasound Physics Chapter 5

When we scan we are sending ___ into a patient's body.

• Pulses

• Energy

• Heat waves

• Sound waves

Manufacturers have to ensure that the ___ of the ultrasound beam is safe.

• Intensity

• sound waves

• pulses

• energy

The concentration of power in a beam is called

• Intensity

• Energy

• Pulsed

• Spatial

What is the units for Intensity?

• Watts

• Watts/cm²

• Cm²

• cm³

What is the equation for intensity?

• Intensity(W/cm³)= power/beam cubic

• Intensity(W/cm²)= power/ beam area

• Intensity(W/cm)= power/area

• Intensity(W/cm)= power/sound beam

True or False

Power/ large area= low intensity

• True

• False

True or False

Power/small area= low intensity

• True

• False

Answer explanation

High intensity

Different cross-sections of the ultrasound beam have different

• energy

• areas

• pulses

• waves

The widest area should have the ___ intensity

• highest

• lowest

• smallest

• largest

The smallest area should have the ___ intensity

• highest

• lowest

• widest

• shorter