Page 1 of 306
Davies Ultrasound Physics exam (2 versions) actual
test ALL 600 QUESTIONS AND CORRECT ANSWERS
LATEST UPDATE THIS YEAR NEW!!
Davies Ultrasound Physics exam 1
QUESTION: The sound beam can be focused by all of the following EXCEPT
A. Acoustic mirror
B. Acoustic lens
C. Curved crystal
D. Matching layer - ANSWER-D. Matching layer
QUESTION: What type of focusing decreases the frame rate (temporal resolution)? - ANSWER-
Multiple transmit
QUESTION: The ability to distinguish between adjacent structures that produce echoes of
similar amplitude is - ANSWER-Contrast resolution
1
,Page 2 of 306
QUESTION: Electronic focusing in the transmit mode is accomplished using - ANSWER-Time
delays to excite transducer elements
QUESTION: When increasing the number of transmit focal zones to improve spatial resolution,
the trade-off is - ANSWER-Lateral resolution vs. temporal
QUESTION: Lateral resolution is determined by - ANSWER-Beam width
QUESTION: In measuring the width (diameter) of the common carotid artery in a long axis view,
or in measuring the LV inferolateral wall in the PLAX view, you would primarily be concerned
with: - ANSWER-Axial resolution
QUESTION: The property of certain materials to create a voltage when they are mechanically
deformed is called - ANSWER-Piezoelectric effect
QUESTION: Axial resolution is equal to - ANSWER-1/2 SPL or SPL/2
QUESTION: The formula for the Q factor is - ANSWER-Frequency divided by the bandwidth
2
,Page 3 of 306
QUESTION: Which of the following is NOT an advantage of using piezoelectric material?
A. Decreased bandwidth
B. Lower acoustic impedance of crystal so matching layers are more efficient
C. Increased sensitivity
D. Increased bandwidth - ANSWER-Decreased bandwidth
QUESTION: Which of the following is NOT true of the backing layer found in a transducer?
A. Is made of epoxy resin with tungsten
B. Is located behind the crystal
C. Is made of air
D. Utilized to stop the crystal from ringiing - ANSWER-B. Is made of air
Q; Which probe would provide the best axial resolution to measure the thickness of a small
structure?
A. 10 Mhz
B. 2.5 Mhz
C. 5 Mhz
D. 7 Mhz - ANSWER-A. 10 Mhz
3
, Page 4 of 306
QUESTION: Which of the following will NOT improve axial resolution?
A. Increased transducer frequency
B. Increased focusing
C. Increased damping
D. Decreased pulse length - ANSWER-B. Increased focusing
QUESTION: Another name for axial resolution - ANSWER-Range
QUESTION: What statement describes a phased array transducer? - ANSWER-Electronically
focused along the length of the array and electronically steered
QUESTION: How is beam steering accomplished in an annular transducer? - ANSWER-
Mechanically
QUESTION: What type of image does a linear segmental (sequential or sequenced) array
produce? - ANSWER-Rectangular image
4
Davies Ultrasound Physics exam (2 versions) actual
test ALL 600 QUESTIONS AND CORRECT ANSWERS
LATEST UPDATE THIS YEAR NEW!!
Davies Ultrasound Physics exam 1
QUESTION: The sound beam can be focused by all of the following EXCEPT
A. Acoustic mirror
B. Acoustic lens
C. Curved crystal
D. Matching layer - ANSWER-D. Matching layer
QUESTION: What type of focusing decreases the frame rate (temporal resolution)? - ANSWER-
Multiple transmit
QUESTION: The ability to distinguish between adjacent structures that produce echoes of
similar amplitude is - ANSWER-Contrast resolution
1
,Page 2 of 306
QUESTION: Electronic focusing in the transmit mode is accomplished using - ANSWER-Time
delays to excite transducer elements
QUESTION: When increasing the number of transmit focal zones to improve spatial resolution,
the trade-off is - ANSWER-Lateral resolution vs. temporal
QUESTION: Lateral resolution is determined by - ANSWER-Beam width
QUESTION: In measuring the width (diameter) of the common carotid artery in a long axis view,
or in measuring the LV inferolateral wall in the PLAX view, you would primarily be concerned
with: - ANSWER-Axial resolution
QUESTION: The property of certain materials to create a voltage when they are mechanically
deformed is called - ANSWER-Piezoelectric effect
QUESTION: Axial resolution is equal to - ANSWER-1/2 SPL or SPL/2
QUESTION: The formula for the Q factor is - ANSWER-Frequency divided by the bandwidth
2
,Page 3 of 306
QUESTION: Which of the following is NOT an advantage of using piezoelectric material?
A. Decreased bandwidth
B. Lower acoustic impedance of crystal so matching layers are more efficient
C. Increased sensitivity
D. Increased bandwidth - ANSWER-Decreased bandwidth
QUESTION: Which of the following is NOT true of the backing layer found in a transducer?
A. Is made of epoxy resin with tungsten
B. Is located behind the crystal
C. Is made of air
D. Utilized to stop the crystal from ringiing - ANSWER-B. Is made of air
Q; Which probe would provide the best axial resolution to measure the thickness of a small
structure?
A. 10 Mhz
B. 2.5 Mhz
C. 5 Mhz
D. 7 Mhz - ANSWER-A. 10 Mhz
3
, Page 4 of 306
QUESTION: Which of the following will NOT improve axial resolution?
A. Increased transducer frequency
B. Increased focusing
C. Increased damping
D. Decreased pulse length - ANSWER-B. Increased focusing
QUESTION: Another name for axial resolution - ANSWER-Range
QUESTION: What statement describes a phased array transducer? - ANSWER-Electronically
focused along the length of the array and electronically steered
QUESTION: How is beam steering accomplished in an annular transducer? - ANSWER-
Mechanically
QUESTION: What type of image does a linear segmental (sequential or sequenced) array
produce? - ANSWER-Rectangular image
4
