WorksheetsReview Pulsed Waves
Total questions: 50
Worksheet time: 26mins
_____ is the time from the start of a pulse to the end of that pulse
Pulse Duration
PRF
PRP
_____ is the time from the start of a pulse to the start of the next pulse
PRP
PRF
Pulse duration
PRF is the reciprocal of
(a)
When changing the imaging depth, which of the following parameters does the operator also change?
PRF
Duty Factor
Prop Speed
PRP
Amplitude
The speed of a 5 MHz continuous wave is 1.8km/sec. The wave is then pulsed with a duty factor of 0.5. What is the new prop speed?
1.8 km/sec
2.5 km/sec
10 km/sec
Which of the following best describes line A?
PRP
Period
Pulse Duration
Frequency
Which of the following best describes line B?
PRP
Period
Pulse Duration
Amplitude
Which of the following best describes line C?
PRP
Pulse Duration
Period
Amplitude
Which of the following best describes line D?
Frequency
PRP
Period
Pulse Duration
Which of the following best describes line E?
Frequency
PRP
Period
Listening Time
Which of the following best describes line F?
Frequency
Peak to Peak amplitude
Period
Pulse Duration
Which of the following best describes line A?
Frequency
PRP
Period
Spatial Pulse Length
Which of the following best describes line D?
Frequency
PRP
Wavelength
Pulse Duration
What is the duty factor for line A?
.5
0.0
.333
1
What is the duty factor for line B?
.5
.333
1
0.0
What is the duty factor for line C?
1
.5
.333
0.0
What is the duty factor for line D?
.333
0.0
1
.5
Which pattern indicates superficial imaging depth?
A
B
C
D
Which patters indicates a deeper imaging depth?
A
B
C
D
Which two patterns cannot create an image of anatomy?
A
B
C
D
A sonographer adjusts the depth of view from 8 cm to 16 cm. What happens to period, frequency, wavelength, speed, amplitude, power, intensity, spatial pulse length, and pulse duration?
Increases
Decreases
Remains the same
A sonographer adjusts the depth of view from 8 cm to 16 cm. What happens to PRF and Duty Factor?
Decreases
Increases
Remains the same
A sonographer adjusts the depth of view from 8 cm to 16 cm. What happens to PRP?
Increases
Decreases
Remains the same
A sonographer is using a 3 MHz transducer and changes to a 6 MHz. The depth remains unchanged. What happens to period and wavelength?
Decreases
Increases
Remains the same
A sonographer is using a 3 MHz transducer and changes to a 6 MHz. The depth remains unchanged. What happens to frequency?
Increases
Decreases
Remains the same
A sonographer is using a 3 MHz transducer and changes to a 6 MHz. The depth remains unchanged. What happens to speed, amplitude, power, intensity, PRF, and PRP?
Increases
Decreases
Remains the same
A sonographer is using a 3 MHz transducer and increases the output power in order to visualize structures that are deeper. What happens to period, frequency, wavelength and speed?
Increases
Decreases
Remains the same
A sonographer is using a 3 MHz transducer and increases the output power to scan deeper in the body. What happens to speed, amplitude and power?
Increases
Decreases
Remains the same
A sonographer is using a 3 MHz transducer and increases the output power to scan deeper in the body. What happens to pulse duration, PRF, duty factor, PRP, and spatial pulse length?
Increases
Decreases
Remains the same
What is the duty factor of a 7 MHz continuous wave sound beam at a depth of 10 cm?
.333
1
.5
0
The percentage or fraction of time that the system transmits sound
Duty Factor
PRP
PRF
Pulse Duration
Duty factor is determined by the
Sound Source
Medium
Both
Pulse duration is determined by the
Sound Source
Medium
Both
In clinical imaging, a pulse is comprised of
2-4 cycles
4-6 cycles
3-6 cycles
The distance or length from the start to the end of one pulse
Spatial Pulse Length
Wavelength
Period
Pulse Duration
Spatial Pulse Length is determined by the
Sound Source
Medium
Both
What creates higher quality images?
Shorter Pulses
Longer Pulses
PRP is determined by the
Sound Source
Medium
Both
Number of pulses created by the system in one second
PRF
PRP
Pulse duration
Frequency
PRF is determined by the
Sound Source
Medium
Both
Shallow imaging =
High PRF
Low PRF
Deep imaging =
High PRF
Low PRF
Shallow imaging =
Short PRP
Longer PRP
Deep imaging =
Longer PRP
Short PRP
Shallow imaging =
High duty factor
Low duty factor
Deep imaging =
High duty factor
Low duty factor
Pulse duration and spatial pulse length CANNOT be changed by the sonographer
T/F
True
False
PRF and PRP are ____ related
Inversely
Directly
By adjusting the depth, the operator also changes the
PRF
PRP
Duty Factor
Pulse duration
Spatial Pulse Length
PRP, PRF, and duty factor can all be changed by the sonographer
T/F
True
False
