Ultrasound physics

Which of these factors has greatest influence on pulse repitition period

• Crystal thickness

• Display depth

• Impedance of medium

• Attenuation of sound beam

The time frame from the beginning of a pulse to its end is

• Period

• Pulse duration

• Pulse length

• PRF

Speed of ultrasound in soft tissue is closest to:

• 1,540 km/sec

• 1.54 cm

• 1,500 m/s

• 1,540 mm/sec

Tags

NGSS.HS-PS4-1

The duty factor for continuous wave ultrasound is

• 1%

• 10.0

• 1.0

• 0.0

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

What is the fraction of time that sound is transmitting

• Pulse duration

• Duty factor

• Period

• PRF spatial duration

Propagation speed is determine by the medium. Which of the following is correct?

• Density increases,speed increases,stiffness Increases,speed increases

• Density increases,speed decreases,stiffness increases,speed increases

• Density decreases,speed decreases, stiffness increases,speed increases

• Density increases,speed decreases,stiffness increases,speed decreases.

Tags

NGSS.HS-PS4-1

The pulse repitition frequency is the number of pulses occurring per

• Wave

• Echo

• Reflection

• Second

Tags

NGSS.HS-PS4-1

Temporal refers to

• Space

• Peak

• Time

• Average

Tags

NGSS.MS-ESS3-5

Which of the following has the lowest intensity?

• SPTP

• SATP

• SPTA

• SATA

Tags

NGSS.HS-PS4-5

NGSS.HS-PS4-3

Highest intensity?

• SATA

• SATP

• SPTP

• SPTA

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

NGSS.HS-PS4-3