DMS 220 - Ultrasound Physics Chapters 1-9 MIDTERM Review Questions
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1. Which of the following best describes sound waves? D: longitudinal pressure
A: transverse, pressure waves waves
B: transverse, longitudinal waves
C: longitudinal, out of phase waves
D: longitudinal pressure waves
2. What is the reciprocal of 1000? C. 0.001
A. 0.1
B. 100
C. 0.001
D. 0.0001
3. Which of these waves is ultrasonic and most useful in B. 4 MHz
diagnostic sonography?
A. 200,000 Hz
B. 4 MHz
C. 400 mHz
D. 2Hz
4. The speed of sound traveling through the soft tissue is B. lower than
____________than speed of sound travelling in bone.
A. higher than
B. lower than
C. equal to
D. it cannot be determined
5. If the number of cycles in a pulse decreases but the C. the spatial pulse length
wavelength remains the same, which of the following is decreased
is true?
A. the frequency is decreased
B. the propagation speed is decreased
, DMS 220 - Ultrasound Physics Chapters 1-9 MIDTERM Review Questions
Study online at https://quizlet.com/_9uw534
C. the spatial pulse length is decreased
D. the period is decreased
6. Which display modes may be used to calculate dis- e) A, B, and C
tance measurements?
a) A-mode.
b) B-mode.
c) M-mode.
d) B and C only.
e) A, B, and C
7. These two waveforms differ in d.Phase
a.Amplitude
b.Intensity
c.Frequency
d.Phase
8. What is the minimum beam diameter for an unfocused D. ½ x disc diameter.
disc transducer?
A. 3 x disc diameter.
B. 2 x disc diameter.
C. Equal to the disk diameter.
D. ½ x disc diameter.
E. ¼ x disc diameter.
9. Which of the following terms does not belong with the d) shallow imaging
others?
a) low duty factor
b) low PRF
c) long PRP
d) shallow imaging
, DMS 220 - Ultrasound Physics Chapters 1-9 MIDTERM Review Questions
Study online at https://quizlet.com/_9uw534
10. The near field length of a 5-MHz unfocused, single-el- B. double
ement transducer will be _______ that of a 2.5-MHz
transducer of the same diameter.
A. Twice.
B. double
C. ½.
D. ¼.
11. Which of the following intensities change when a C.SATA
sonographer adjusts the maximum imaging depth ob-
tained during a sonographic examination? A.SPPA
B.SAPA
C.SATA
D.SPTP
12. What happens to the pulse repetition period if the B. decreases
sonographer decreases the maximum imaging depth
achieved in an ultrasound scan?
A. increases
B. decreases
C. remains the same
D. cannot be determined
13. 13. Reduction in the strength of sound beam as it B. Attenuation
travels through a medium is defined as:
A. Wavelength
B. Attenuation
C. Propagation speed
D. Frequency
14. 14. In an imaging transducer, what is the purpose of B. improve image quality
attaching the backing material to the PZT?
A. decrease the transducer's sensitivity
Study online at https://quizlet.com/_9uw534
1. Which of the following best describes sound waves? D: longitudinal pressure
A: transverse, pressure waves waves
B: transverse, longitudinal waves
C: longitudinal, out of phase waves
D: longitudinal pressure waves
2. What is the reciprocal of 1000? C. 0.001
A. 0.1
B. 100
C. 0.001
D. 0.0001
3. Which of these waves is ultrasonic and most useful in B. 4 MHz
diagnostic sonography?
A. 200,000 Hz
B. 4 MHz
C. 400 mHz
D. 2Hz
4. The speed of sound traveling through the soft tissue is B. lower than
____________than speed of sound travelling in bone.
A. higher than
B. lower than
C. equal to
D. it cannot be determined
5. If the number of cycles in a pulse decreases but the C. the spatial pulse length
wavelength remains the same, which of the following is decreased
is true?
A. the frequency is decreased
B. the propagation speed is decreased
, DMS 220 - Ultrasound Physics Chapters 1-9 MIDTERM Review Questions
Study online at https://quizlet.com/_9uw534
C. the spatial pulse length is decreased
D. the period is decreased
6. Which display modes may be used to calculate dis- e) A, B, and C
tance measurements?
a) A-mode.
b) B-mode.
c) M-mode.
d) B and C only.
e) A, B, and C
7. These two waveforms differ in d.Phase
a.Amplitude
b.Intensity
c.Frequency
d.Phase
8. What is the minimum beam diameter for an unfocused D. ½ x disc diameter.
disc transducer?
A. 3 x disc diameter.
B. 2 x disc diameter.
C. Equal to the disk diameter.
D. ½ x disc diameter.
E. ¼ x disc diameter.
9. Which of the following terms does not belong with the d) shallow imaging
others?
a) low duty factor
b) low PRF
c) long PRP
d) shallow imaging
, DMS 220 - Ultrasound Physics Chapters 1-9 MIDTERM Review Questions
Study online at https://quizlet.com/_9uw534
10. The near field length of a 5-MHz unfocused, single-el- B. double
ement transducer will be _______ that of a 2.5-MHz
transducer of the same diameter.
A. Twice.
B. double
C. ½.
D. ¼.
11. Which of the following intensities change when a C.SATA
sonographer adjusts the maximum imaging depth ob-
tained during a sonographic examination? A.SPPA
B.SAPA
C.SATA
D.SPTP
12. What happens to the pulse repetition period if the B. decreases
sonographer decreases the maximum imaging depth
achieved in an ultrasound scan?
A. increases
B. decreases
C. remains the same
D. cannot be determined
13. 13. Reduction in the strength of sound beam as it B. Attenuation
travels through a medium is defined as:
A. Wavelength
B. Attenuation
C. Propagation speed
D. Frequency
14. 14. In an imaging transducer, what is the purpose of B. improve image quality
attaching the backing material to the PZT?
A. decrease the transducer's sensitivity
