Davies Ultrasound Physics Exam 2 All 350 Questions And Well Elaborated Answers Latest Updated This Year

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DAVIES ULTRASOUND PHYSICS EXAM 2 ALL 350
QUESTIONS AND WELL ELABORATED ANSWERS LATEST
UPDATED THIS YEAR


Question: Transducer sterilization can be performed by all of the following techniques except:

A. Cold sterilization

B. Disinfectant solutions as per manufacturer recommendations

C. Autoclave sterilization

D. All of the above can be used - CORRECT ANSWER✔✔B. Autoclave sterilization




Question: 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 - CORRECT ANSWER✔✔A. 10 Mhz




Question: Which of the following will NOT improve axial resolution?

A. Increased transducer frequency

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B. Increased focusing

C. Increased damping

D. Decreased pulse length - CORRECT ANSWER✔✔B. Increased focusing




Question: Another name for axial resolution - CORRECT ANSWER✔✔Range




Question: What statement describes a phased array transducer? - CORRECT
ANSWER✔✔Electronically focused along the length of the array and electronically steered




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 - CORRECT ANSWER✔✔D. Matching layer




Question: What type of focusing decreases the frame rate (temporal resolution)? - CORRECT
ANSWER✔✔Multiple transmit




Question: The ability to distinguish between adjacent structures that produce echoes of similar
amplitude is - CORRECT ANSWER✔✔Contrast resolution

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Question: Electronic focusing in the transmit mode is accomplished using - CORRECT
ANSWER✔✔Time delays to excite transducer elements




Question: When increasing the number of transmit focal zones to improve spatial resolution,
the trade-off is - CORRECT ANSWER✔✔Lateral resolution vs. temporal




Question: Lateral resolution is determined by - CORRECT 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: - CORRECT ANSWER✔✔Axial resolution




Question: The property of certain materials to create a voltage when they are mechanically
deformed is called - CORRECT ANSWER✔✔Piezoelectric effect




Question: Axial resolution is equal to - CORRECT ANSWER✔✔1/2 SPL or SPL/2




Question: The formula for the Q factor is - CORRECT ANSWER✔✔Frequency divided by the
bandwidth

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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 - CORRECT 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 - CORRECT ANSWER✔✔B. Is made of air




Question: How is beam steering accomplished in an annular transducer? - CORRECT
ANSWER✔✔Mechanically




Question: What type of image does a linear segmental (sequential or sequenced) array
produce? - CORRECT ANSWER✔✔Rectangular image




Question: Dividing a normal crystal element into many smaller elements is termed - CORRECT
ANSWER✔✔Subdicing