URR Mock Test 1 Questions with 100

URR Mock Test 1 Questions with 100% Verified Correct Answers Which of the following transducers will produce the highest frequency sound waves?

• 6mm element thickness, 2mm/μs propagation speed of the element
• 2mm element thickness, 6mm/μs propagation speed of the element
• 6mm element thickness, 6mm/μs propagation speed of the element
• 2mm element thickness, 2mm/μs propagation speed of the element - Correct Answer 2mm

element thickness, 6mm/μs propagation speed of the element

The narrowest portion of a beam produced by a focused ultrasound transducer is:

• the focal point
• the Fresnel zone
• the Fraunhofer zone
• the first centimeter of the beam that leaves the transducer - Correct Answer the focal point

If a Doppler system is operating at a PRF of 5000/s what is the maximum Doppler frequency that can be detected?

• 2500kHz
• 500kHz
• 2.5kHz
• 5kHz - Correct Answer 2.5kHz

Why does Doppler tracing not touch the baseline on either side?

• high filter settings
• decreased Doppler gain settings
• spectral broadening
• decreased rejection settings - Correct Answer high filter settings

Which of the following statements correctly describes annular arrays?

• an annular array can electronically focus the beam
• an annular array can use phasing to electronically steer the beam 1 / 3

• annular arrays provide the lowest slice thickness resolution
• annular arrays usually contain 30 or more circular elements - Correct Answer an annular array can

electronically focus the beam Which of the following describes the primary advantage of a 1.5D array over a 1D array?

• the 1.5D array eliminates the need for a stand-off pad for superficial imaging
• the 1.5D array can produce a trapezoid field of view while the 1D array can only produce a

rectangular field of view

• the 1.5D array allows for 3D imaging while the 1D array does not
• the 1.5D array allows for variable elevation focus while the 1D array has a fixed elevation focus -

Correct Answer the 1.5D array allows for variable elevation focus while the 1D array has a fixed elevation focus What wave parameter is defined as the wavelength times the number of cycles in the pulse?

• period
• spatial pulse length
• pulse repetition frequency
• pulse duration - Correct Answer spatial pulse length

You are scanning a thyroid gland with a 5cm wide linear array transducer. You are unable to document the upper and lower poles in the same image to obtain a length measurement of the gland. Which of the following techniques would assist in documenting the entire thyroid gland on a single image?

• spatial compounding
• electronic focusing
• 3D volume rendering
• panoramic imaging - Correct Answer panoramic imaging

The average speed of sound in soft tissue is:

• 1580m/s
• 3300m/s
• 1540m/s
• 1540cm/s - Correct Answer 1540m/s 2 / 3

Which of the following is NOT the proper procedure for disinfection of instruments between patients?

• saniwipes or Cidex can be used to disinfect the transducer after each ultrasound exam
• sonographers should wash their hands after each exam, even if gloves were used
• all biopsy needles should be sent out for sterilization after each use
• gel bottles should be sanitized daily using disinfectant cleanser - Correct Answer all biopsy needles

should be sent out for sterilization after each use Which of the following correctly describes the color displayed on the image?

• the color scale should be reduced so that the entire vessel is filled with blue color
• the color scale should be reduced so that the entire vessel is filled with red color
• the red and blue colors indicate that flow is moving in two different directions simultaneously in

the vessel

• the heel-to-toe method can be used to change the course of the vessel across the image and this

will allow the vessel to accurately display a single color - Correct Answer the heel-to-toe method can be used to change the course of the vessel across the image and this will allow the vessel to accurately display a single color What effect will increased hematocrit levels have on an arterial duplex exam?

• hematocrit levels do not affect a Doppler evaluation
• decreased blood viscosity
• increased color flow display
• decreased blood flow velocities - Correct Answer decreased blood flow velocities

When using a tissue phantom to evaluate range accuracy, what unit will be used to report the measurement?

• centimeter
• micrometer
• decibel
• millisecond - Correct Answer centimeter

Increasing the angle of electronic steering causes _______ production of lobe artifact

• / 3