X Zone

Question 0

Which of the following lists is in increasing order?
A. Centi, Milli, Kilo, Mega, Nano
B. Micro, Kilo, Milli, Deci, Mega
C. Mega, Kilo, Milli, Nano, Centi
D. Mega, Micro, Deci, Milli, Hecto
E. Micro, Milli, Deci, Kilo, Mega

Answer 0

E: Micro, Milli, Deci, Kilo, Mega

Question 1

It is acceptable to describe a sound wave by all of the following EXCEPT?
A. transverse
B. Comprised of compressions and rarefractions
C. May be inaudible
D. Carries energy from one location to another
E. Longitudinal

Answer 1

A. Transverse

Question 2

Two similar reflections appear on an ultrasound image at exactly the same depth. One of the reflections is an artifact. The artifact may be all of the following EXCEPT:
A. Side lobe artifact
B. Refraction artifact
C. Grating lobe artifact
D. Mirror image artifact

Answer 2

D. Mirror Image Artifact

Mirror images appear deeper than the true anatomic structure.

Question 3

An U/S system is operating in the harmonic mode. The image on the display of the ultrasound system was created using sound reflections with a frequency of 6Mz. What is the frequency of sound emitted by the system's transducer? 
A. 12 MHz
B. 9 MHz
C. 3 MHz
D. 9 MHz
E. 6 MHz

Answer 3

C. 3 MHz

Question 4

Which of the following principles expresses the process of refraction? 
A. Poiseuille's Law
B. Snell's Law
C. Reflective Index Formulatio
D. Bernouilli's Principle
E. Reynold's Number

Answer 4

B. Snell’s Law

Question 5

All of the following are examples of post processing EXCEPT:
A. Read Magnification
B. Log Compression
C.Black/White inversion 
D. Freeze Frame
E. Contrast Variation

Answer 5

B. Log Compression

Question 6

What is the wavelength of a 3 MHz sound pulse in soft tissue? 
A. 1.54 mm
B. 0.49 mm
C. 1.54 km
D. 0.51 m
E. 0.75 mm

Answer 6

B. 0.49 mm

In soft tissue, the wavelength of 3 MHz sound is actually 0.51 mm. B is the best answer

Question 7

A sound wave is traveling in the body and propagating from one form of soft tissue to another. For example, sound is moving from muscle to blood. What percentage of the sound wave is most likely to be reflected at this boundary?
A. 0.5%
B. 25%
C. 99%
D. 5%
E. 75%

Answer 7

A. 0.5%

Question 8

Aliasing is an artifact observed when performing Doppler Ultrasonography. Which of the following signals is most likely to alias? 
A. 7MHz with a PRF of 3KHz
B. 2 MHz sound with a PR of 87 kHz
C. 6MHz sound wave with a PRF of 4 kHz
D. 9 MHz continuous wave sound
E. 2 MHz continuous wave sound

Answer 8

A. 7 MHz with a PRF of 3 kHz

Question 9

Two objects start at the same point. One object moves towards the west at 5 MPH. The other object moves towards the west at 15 MPH. A sound wave is sent from the first object to the second to measure a Doppler frequency. Which of the following statements is true?
A. The Doppler frequency will be negative
B. The Doppler frequency will be positive
C. The Doppler frequency will be zero
D. The received frequency will exceed the transmitted frequency.

Answer 9

A. The Doppler frequency will be negative

Although moving in the same direction, the objects are moving further apart. This will create a negative Doppler frequency

Question 10

Which of the following sound waves is ultrasonic and least useful in diagnostic imaging?
A. 4 MHz
B. 9 MHz
C. 25 kHz
D. 5,000 Hz
E. 2,000 kHz

Answer 10

C. 25 kHz

This sound wave is ultrasonic, but has too low a frequency to be useful in diagnostic imaging

Question 11

Sound is traveling in a medium with an impedance of 8 rayls and a propagation speed of 1450m/s. The sound wave propagates into a second medium with an impedance of 6 rayls and a propagation speed of 1.855 km/s. The sound beam strikes the boundary between the media and is both partially transmitted and reflected. The angle of the incident sound beam is 30 degrees. What is the angle of reflection? 
A. 20 degrees
B. 30 degrees
C. 70 degrees
D. Less than 20 degrees
E. More than 70 degrees

Answer 11

B. 30 degrees

Question 12

A sonographer adjusts an ultrasound machine to double the depth of view from 5cm to 10cm. If the frame rate remains the same, which one of the following also changed? 
A. Multi-focus enabled 
B. Shallower depth of view
C. Narrower image sector
D. Increased line density
E. Wider imaging sector

Answer 12

C. Narrower image sector

Question 13

The sonographer can eliminate the aliasing artifact experienced during a Doppler examination by all of the following EXCEPT:
A. Relocating the sample volume to more superficial depth
B. Adjusting the baseline
C. Changing from pulsed to continuous wave sound beams.
D. Moving the probe so that the angle between the sound beam and the direction of flow is closer to 90 degrees
E. Using a lower frequency transducer

Answer 13

B. Adjusting the baseline

Question 14

During transmission of a sound pulse, some pulses are focused. All of the following are methods of focusing during transmission EXCEPT:
A. Electronic Phasing
B. Using a matching layer
C. Using an acoustic lens
D. Using a curved piezoelectric crystal
E. Internal

Answer 14

B. Using a matching layer

Question 15

A sound wave is propagating in soft tissue. As it propagates, it moves from soft tissue to bone. The angle measured between the wave's direction of propagation and soft tissue-bone interface is 90 degrees. All of the following accurately describe this EXCEPT: 
A. Orthogonal 
B. Oblique
C. Perpendicular 
D. Normal
E. Right angle

Answer 15

B. Oblique