Spatial Pulse Length (SPL) is the product of a. velocity and PRP b. frequency and period c. propagation speed and PRF d. wavelength and cycles per pulse e. wavelength and velocity​

SPL is determined by

Spatial pulse length is

What happens to SPL if depth of view increases using the same transducer?

If frequency increases, the spatial pulse length

Pulse A is from a 5 MHz transducer and pulse B is from a 10 MHz transducer. Both pulses have 4 cycles per pulse.

If you increase the depth of view from 2 cm to 3 cm, the SPL

Which pulse has a longer spatial pulse length?

PRP is defined as

The number of pulses occurring in 1 sec is called the

Two waves can have identical Pulse Repetition Frequencies, even if their frequencies are different.

When you change the PRF you are changing

The range of PRF used in diagnostic ultrasound is

PRP and PRF can be changed by

If the depth of view increases, the PRF

If the PRF increases, the PRP

Pulse Repetition Period is the reciprocal of Pulse Duration

The PRF of a 5 MHz transducer is greater than the PRF of a 2.5 MHz transducer.

PRF depends on

What is the value of the duty cycle for continuous wave (CW) U/S?

In pulsed ultrasound, the maximum value of the duty factor is

Duty factor depends on the frequency of the transducer

Duty factor is determined by

If the PRF decreases, the duty factor

When the spatial pulse length increases, the duty factor

Two pulses are created by different transducers and both have the same frequency, the pulse containing more cycles has

Duty factor can be changed by the sonographer.

The units for duty factor are

Which is the highest intensity?

What are the units of intensity?

Intensity is equal to

Intensities are important because

Temporal intensity is

Spatial intensity is

The beam uniformity coefficient describes

The spatial intensity is usually highest at

Which of the following will results in a decrease in beam intensity?

Power divided by beam areas is equal to

Pulse duration is equal to

Pulse duration is determined by

A sonographer can adjust the duration of an acoustic pulse since it depends on the maximum imaging depth.

The units of pulse duration are units of

If the depth of view increases, the pulse duration

Pulses from a 2.5 MHz transducer and a 5 MHz transducer each have 3 cycles per pulse. The pulse from the 2.5 MHz transducer has

A sonographer can adjust the pulse duration by

Which of the following is determined by both source and medium?

Which of the following frequencies is closest to the lower limit of iltrasound

Sound can be described as

Which waves are audible

In order to be identified as ultrasound, the frequency of a wave must be greater than

Which of these waves is most useful in diagnostic sonography

The frequency of a transducer is 25,000,000 cycles per second. This can be written as

All of the following are acoustic variables, except

Which parameter of the medium has the most effect on the velocity of sound in the medium?

Constructive interference has the effect of ________ the amplitude of a wave

The interaction of echos that causes reinforcement rather than cancellation is known as

Wavelength depends on which two factors ?

Which of the following waves has the longest period

Of the four waves whose frequencies are listed below which has the shortest

If the frequency of an U/S wave is doubled what happens to the period

If the frequency is 1MHz, what is the period

As the frequency of an acoustic variable increases the wavelength

As the sound wave travels through soft tissue what happens to the frequency

As sound propagations through soft tissue the ampltitude

Intensity and power are related to amplitude by

If the amplitude is doubled the intensity is

If beam area is reduced by half and the power stays the same the intensity

The relative measurement of intensity based on the logarithmic scale has units of

The normal range of intensities used in Doppler ultrasound is

The wave propagates through the tissue the amplitude

With a 2 MHz transducer the wavelength in soft tissue is approximately

As the frequency of the wave increases the wavelength will

The wavelength of the 3MHz transducer is shorter than the 6 MHz transducer

What is the wavelength of the 3 MHz transducer is shorter then the 6 MHz

What is the wavelength of 3MHz sound in soft tissue

Image quality is affected by wavelength

If the frequency increases wavelength

The relationship between frequency and wave length is

Which pulse has a longer wavelength

The number of wavelength passing a given point in a single second is called

Stiffness of a medium is the opposite of its

When the elasticity of a medium is high the _____ is high

The term bulk modulus is related to which quality

The propagation speed used for soft tissue is