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1) The cosine of 90 degrees is

1. -1
2. -.5
3. 0
4. .5

Answers are locked. Please click here to buy them. 2) In order to image deeper structures, _______.

1. the TGC needs to be increased
2. the PRF needs to be increased
3. the frame rate needs to be increased
4. the PRF needs to be decreased

Answers are locked. Please click here to buy them. 3) If the PRF of a real time system is 2200 Hz, the maximum depth of imaging would be ________.

1. 35cm
2. 30 mm
3. 30cm
4. 35mm

Answers are locked. Please click here to buy them. 4) All of the following are disadvantages of analog scan converter except:

1. image fade
2. image flicker
3. deterioration
4. Low resolution image

Answers are locked. Please click here to buy them. 5) Period is the _____ it takes for one _____ to occur.

1. time; wavelength
2. frequency; cycle
3. time; pulse
4. time; cycle

Answers are locked. Please click here to buy them. 6) The rate at which energy passes through a unit area is called____.

1. Intensity
2. attenuation
3. power
4. amplitude

Answers are locked. Please click here to buy them. 7) Vertical parallel scan lines are seen with which transducer format?

1. Curvilinear
2. linear
3. vector
4. convex

Answers are locked. Please click here to buy them. 8) Sonography is medicla anatomic imaging using a ______-______ technique.

1. transducer instrument
2. starting point
3. vertical parallel
4. pulse echo

Answers are locked. Please click here to buy them. 9) If two variable are inversely proportional, if one decreased by a factor of 5, then the other

1. decreases
2. decreases by a factor of 5
3. increases
4. increased by a factor of 5

Answers are locked. Please click here to buy them. 10) Stiffer media have ______ sound speeds.

1. stiffness doesn't change the propagation speed
2. lower
3. higher
4. sound cannot propagate through stiffer media

Answers are locked. Please click here to buy them. 11) Sequenced, phased, and vector are types of:

1. operations
2. transducers
3. constructions
4. focusing

Answers are locked. Please click here to buy them. 12) Waves that exist at the same location and time will combine together. What is this called?

1. rarefaction
2. interference
3. inference
4. mechanical interaction

Answers are locked. Please click here to buy them. 13) Mirror image artifact is a form of:

1. reverberation
2. Grating Lobes
3. speed error
4. refraction

Answers are locked. Please click here to buy them. 14) Regions of lower pressure and density are called

1. compressions
2. longitudinal waves
3. rarefactions
4. acoustic variables

Answers are locked. Please click here to buy them. 15) Snell's law relates the _____ beam direction to the incident beam direction and the speeds of sound in the two materials forming the interface?

1. transmitted
2. rarefaction
3. Scattering
4. reflected

Answers are locked. Please click here to buy them. 16) What is the attenuation coefficient for a 5.0 MHz transducer in soft tissue?

1. 10.0 dB/cm
2. .1 dB/cm
3. 2.5 dB/cm
4. .25dB/cm

Answers are locked. Please click here to buy them. 17) Diagnostic Ultrasound transducer generate a ______ of sound into the body?

1. Pulse
2. wave
3. frequency
4. Doppler

Answers are locked. Please click here to buy them. 18) Amplitude is the maximum variation that occurs in an acoustic ______.

1. variable
2. propagation speed
3. Wave
4. medium

Answers are locked. Please click here to buy them. 19) If the wavelength is .5 mm the spatial pulse length for a 4 cycle pulse is:

1. 0mm
2. .8mm
3. 8.0mm
4. .2mm

Answers are locked. Please click here to buy them. 20) Attenuation increased with increasing ____.

1. power
2. wavelenght
3. pressure
4. frequency

Answers are locked. Please click here to buy them. 21) Gray-scale artifacts include all of teh following except:

1. mirror image
2. aliasing
3. range ambiguity
4. shadowing

Answers are locked. Please click here to buy them. 22) Ultrasound pulses contain a range of frequencies called the _______.

1. fundamental frequencies
2. duty factor
3. bandwidth
4. pulse repetition frequenc

Answers are locked. Please click here to buy them. 23) Persistence does all of the following except:

1. increase contrast resolution
2. Increase frame rate
3. improve dynamic range
4. decrease speckle

Answers are locked. Please click here to buy them. 24) As sound travels, the reduction in amplituded and intensity of the wave is called?

1. attenuation
2. absorption
3. reflection
4. scattering

Answers are locked. Please click here to buy them. 25) Old echo information from previous frames is retained while the new echoes are added to the image in the direction in which the scan plane is moving is called______.

1. spatial compounding
2. pixel interpolation
3. panoramic imaging
4. harmonic imaging

Answers are locked. Please click here to buy them. 26) Pulse repetition frequency is the ____ of pulses occuring in 1 second.

1. speed
2. number
3. type
4. cycle

Answers are locked. Please click here to buy them. 27) The wavelength of 3 MHz ultrasound in soft tissue is _____ mm.

1. 1
2. .51
3. 510
4. 4.6

Answers are locked. Please click here to buy them. 28) What is the travel time in microseconds for US to image a structure that is 5cm deep?

1. 5
2. 13
3. 65
4. 130

Answers are locked. Please click here to buy them. 29) To receive information for display at a rapid rate, it is desirable to use a _______.

1. high operating frequency
2. low PRF
3. lower operating frequency
4. high PRF

Answers are locked. Please click here to buy them. 30) The PRF is the number of _______sent to the transducer each second.

1. none of the answers
2. cycles
3. ultrasound pulses
4. voltage pulses

Answers are locked. Please click here to buy them. 31) Mirror imaging of a Doppler spectrum can ________.

1. appear on teh oposite side of the baseline
2. Occur when the Doppler angle is near 90 degrees
3. occur when the receiver gain is set too high
4. all of the above

Answers are locked. Please click here to buy them. 32) Ultrasound pulses contain a range of frequencies called the ______.

1. bandwidth
2. duty factor
3. fundamental frequencies
4. pulse repetition frequencies

Answers are locked. Please click here to buy them. 33) Propagation speed is higher in _____ than soft tissue.

1. bone
2. lung
3. fat
4. water

Answers are locked. Please click here to buy them. 34) ____ is the number of complete cycles per second.

1. Period
2. Wavelength
3. Frequency
4. Propagation speed

Answers are locked. Please click here to buy them. 35) The attenuation of a 5 MHz tranducer in soft tissue would be _____ dB in 2 cm of depth.

1. 20
2. 10
3. 5
4. 1.25

Answers are locked. Please click here to buy them. 36) What is the period of a 5.0 MHz in soft tissue.

1. 02 us
2. .2 us
3. 3.1 us
4. .2 sec

Answers are locked. Please click here to buy them. 37) What is the maximum depth in soft tissue for a PRF of 10kHz.

1. 5 mm
2. 7.7 mm
3. 7.7 cm
4. 7.5 cm

Answers are locked. Please click here to buy them. 38) Frequency _____ wavelength.

1. is equal to
2. has no bearing on
3. is inversely proportional to
4. is directly proportional to

Answers are locked. Please click here to buy them. 39) A sonographer adjusts an ultrasound scan to double the depth of view from 5 cm to 10 cm. If the frame rate remains the same, which one of the following also occurs?

1. increased the line density
2. narrower sector
3. mulit focused imaging turned on
4. wider sector

Answers are locked. Please click here to buy them. 40) Impedance is equal to density multiplied by ____

1. wavelength
2. path length
3. stiffness
4. propagational speed

Answers are locked. Please click here to buy them. 41) Regions of lower pressure and density are called _____.

1. longitudinal waves
2. compressions
3. acoustic variables
4. rarefactions

Answers are locked. Please click here to buy them. 42) A sonographer using a phased array ultrasound system, turns off the multi-focus feature. What is most likely consequence of this action?

1. temporal resolution improves
2. frame rate decreases
3. temporal resolution degrades
4. imaging depth increases

Answers are locked. Please click here to buy them. 43) Electronic scanning is performed by _____.

1. mechanical transducers
2. array transducers
3. sector transducers
4. linear transducers

Answers are locked. Please click here to buy them. 44) _____ array is the combination of linear and phased array operations.

1. phased
2. convex
3. vector
4. interventional

Answers are locked. Please click here to buy them. 45) Beneficial artifacts include all of the following except:

1. reverberation
2. Enchancement
3. shadowing

Answers are locked. Please click here to buy them. 46) Which of the following would be least likely to cause acoutic shadowing?

1. Urinary bladder
2. uterine fibroid
3. gallstone
4. bowel gas

Answers are locked. Please click here to buy them. 47) The frequency of the ______ determines the frequency of the resulting ultrasound pulse.

1. voltage pulse
2. bandwidth
3. beam former
4. operating frequency

Answers are locked. Please click here to buy them. 48) The shadowing and enhancement are description of __________ artifacts?

1. attenuation
2. refraction
3. propagation
4. reverberation

Answers are locked. Please click here to buy them. 49) In oblique incidence the ____ and ____ angles are always equal.

1. normal ; transmitted
2. incidence; transmitted
3. incidence; reflection
4. transmitted; reflected

Answers are locked. Please click here to buy them. 50) With too much gain, __________.

1. saturation occurs
2. differenced in echo strenghth are lost
3. there is a decrease in contrast resolution
4. All of the above

Answers are locked. Please click here to buy them. 51) To avoid echo misplacement:

1. a code is added to the pulser
2. multiple receivers are installed
3. all echoes from one pulse must be received before the next pulse is emitted

Answers are locked. Please click here to buy them. 52) Which of the following forms of resolution improved when frame rate increases?

1. temporal
2. lateral
3. longitudinal
4. spatial

Answers are locked. Please click here to buy them. 53) Which artifact displaces structures axially?

1. Refraction
2. Speed Error
3. Reverberation
4. Grating lobes

Answers are locked. Please click here to buy them. 54) Range ambiguity can occur in which of the following?

1. Pulsed Doppler instruments
2. Color doppler instruments
3. Duplex instruments
4. All of the above

Answers are locked. Please click here to buy them. 55) The fraction of time that pulsed US is on is called____?

1. PRP
2. DF
3. Period
4. SPL

Answers are locked. Please click here to buy them. 56) 20 kHz is equal to _____ Hz.

1. 200,000
2. 2000
3. 20,000
4. 200

Answers are locked. Please click here to buy them. 57) If the PD is 3 u and the PRP is 35-0 usec, the DF is _____%?

1. 6
2. 1.16
3. .86
4. 086

Answers are locked. Please click here to buy them. 58) Calculate the pulse duration for a 3. MHz transducer in soft tissue with a 4 cycle pulse.

1. 2 micro second
2. 12. micro second
3. 13. micro second
4. 1.3 micro second

Answers are locked. Please click here to buy them. 59) a bit memory has an _______ shade memory.

1. 4
2. 8
3. 256
4. 16

Answers are locked. Please click here to buy them. 60) Pulse duration will increase with all the following except?

1. period
2. number of cycles in the pulse
3. Frequency
4. None of the above

Answers are locked. Please click here to buy them. 61) All of the following are advantages of PACS systems except:

1. older, archieve studies and reports an be reviewed easliy
2. images have hight resolution than what appears on the systems display
3. data will not deteriorate
4. images can be delivered to distant location on the imaging netork

Answers are locked. Please click here to buy them. 62) What term describes the number of cycles that an acoustic variable completes in a second?

1. period
2. frequency
3. variable rate
4. PRP

Answers are locked. Please click here to buy them. 63) Enhancement of an echo results from a structure having ______.

1. higher attenuation than surrounding structures
2. higher impedance than surrounding structures
3. lower density than surrounding structures
4. lower attenuation than structures

Answers are locked. Please click here to buy them. 64) Refraction may display ______

1. 1 incorrect structure shape
2. incorrect structure size
3. incorrect structure location
4. all of the above

Answers are locked. Please click here to buy them. 65) Which of the following will NOT result in a shorter pulse duration?

1. using a higher frequency
2. using a shorter period
3. a lower propagaion velocity
4. suing few pulses

Answers are locked. Please click here to buy them. 66) Sound requires a ________ through which to travel.

1. wave
2. pressure
3. vacuum
4. medium

Answers are locked. Please click here to buy them. 67) If you employ a 7.5 MHz transducer, what is the wavelength of the sound in soft tissue.

1. 1mm
2. .11mm
3. 025mm
4. .20mm

Answers are locked. Please click here to buy them. 68) What is the maximum penetration depth with a frame rate of 32 frames per second and a line density of 100 lines per fram and using only one focus.

1. 24 mm
2. 12 cm
3. 20 cm
4. 24 cm

Answers are locked. Please click here to buy them. 69) The impedance of the matching layer is _______.

1. less than the value between the transducer element and tissue
2. equal to the tissue
3. greater than the value between the transducer element and tissue
4. intermediate value between the transducer element and tissue

Answers are locked. Please click here to buy them. 70) To receive information for display at a rapid rate, it is desirable to use a _______.

1. high operating frequency
2. lower operating frequency
3. Low PRF
4. high PRF

Answers are locked. Please click here to buy them. 71) The _______ is the number of sonographic images entered into memory per second.

1. cine loop
2. frame rate
3. image refresh rate
4. PRF

Answers are locked. Please click here to buy them. 72) If an echo returns 104u after a pulse was emitted by a transducer, at what depth is the structure that produced the echo located?

1. 8mm
2. 8.mm
3. 80.cm
4. 8.cm

Answers are locked. Please click here to buy them. 73) The attenuation of a 5.0MHz transducer at a depth of 4cm is _____ dB.

1. 20. dB
2. 16.0 dB
3. 1.6 dB
4. 10. dB

Answers are locked. Please click here to buy them. 74) Which of the following is the most important in determining the frame rate of the system?

1. transmitter output
2. tranducer frequency
3. speed of sound in the medium
4. dynamic range of the received

Answers are locked. Please click here to buy them. 75) Propagation speed is primarily determined by the _____ of the medium.

1. stiffness
2. density
3. thickness
4. water

Answers are locked. Please click here to buy them. 76) the range of frequencies found within a pulse describes with of the following terms?

1. pulse repetition frequency
2. harmonics
3. bandwidth
4. duty factor

Answers are locked. Please click here to buy them. 77) If you switch to a lower frequency for penetration, the wavelength of the transducer will ______?

1. remain unchanged
2. double
3. increase
4. decrease

Answers are locked. Please click here to buy them. 78) The duty factor will increase with all of the following except.

1. period
2. pulse duration
3. PRF
4. none of the above

Answers are locked. Please click here to buy them. 79) Brightness mode is term?

1. gray-scale
2. B-Mode
3. B-Scan
4. All of the above

Answers are locked. Please click here to buy them. 80) What is the PD equal to?

1. frequency × period
2. period × wavelength
3. # of cycles in a pulse/wavelength
4. period × # of cycles in the pulse

Answers are locked. Please click here to buy them. 81) A sonographer adjusts an ultrasound scan to double the depth of view from 5 cm to 10 cm. What happens to the frame rate?

1. it is doubled
2. it is halved
3. it is unchanged

Answers are locked. Please click here to buy them. 82) If the beam power increases, intensity will _______.

1. remain unchanged
2. double
3. increase
4. decrease

Answers are locked. Please click here to buy them. 83) Which of the following are averaging techniques of an ultrasound system?

1. parallel processing
2. pixel interpolation
3. smoothing
4. persistence

Answers are locked. Please click here to buy them. 84) A rectangular image display would be seen when using a ________ transducer?

1. convex
2. sector
3. linear
4. vector

Answers are locked. Please click here to buy them. 85) 3D imaging requires many adjacent tissue ____ ____ to build the image.

1. frequency shifts
2. ultrasound pulses
3. moving objects
4. cross sections

Answers are locked. Please click here to buy them. 86) If two variables are directly proportional, if one increases by a factor of 5, then the other

1. decreases
2. decreases by a factor of 5
3. increases
4. increases by a factor of 5

Answers are locked. Please click here to buy them. 87) Which resolution relates to more directly to transducers?

1. temporal
2. Vectoral
3. contrast
4. detail

Answers are locked. Please click here to buy them. 88) What does 3 dB of attenuation mean?

1. one third of the original intensity
2. one half of the original intensity?
3. increasing amplitude
4. 4 decibels more than the original intensity

Answers are locked. Please click here to buy them. 89) If the speed of sound in a medium is 100m/sec, how long will it take sound to travel 420m?

1. .42 sec
2. 4.2 sec
3. 42 sec
4. 420sec

Answers are locked. Please click here to buy them. 90) The wavelenght of 3 MHz US in soft tissue is ______ mm.

1. 0.51
2. 5.1
3. 510
4. 4.6

Answers are locked. Please click here to buy them. 91) In order to image deep structures __________.

1. the TGC needs to be increased
2. the PRF needs to be decreased
3. the frame rate needs to be increased
4. the PRF needs to be increased

Answers are locked. Please click here to buy them. 92) The following are all ultrasound frequencies except:

1. 30,000 Hz
2. 250.0kHz
3. 15.0 kHz
4. .30 Hz

Answers are locked. Please click here to buy them. 93) What is the SPL of a 4 cycle pulse with a wavelength of 0.1mm ?

1. .4mm
2. .4cm
3. 4.0 mm
4. 40.mm

Answers are locked. Please click here to buy them. 94) ______ is the number of complete cycles per second.

1. period
2. propagation speed
3. wavelength
4. Frequency

Answers are locked. Please click here to buy them. 95) Intensity is equal to the power of a wave dived by the _____ over which the power is spread.

1. area
2. diameter
3. radius
4. width

Answers are locked. Please click here to buy them. 96) Which of the following characteristic will create the slowest speed of sound?

1. High density, high stiffness
2. low density, high stiffness
3. high density, low stiffness
4. low density, low stiffness

Answers are locked. Please click here to buy them. 97) _____ is (are) the even and odd multiples of the fundamental frequency.

1. side lobes
2. Harmonics
3. mechancial waves
4. bandwidth

Answers are locked. Please click here to buy them. 98) All of the following are advantages of spatial compounding except:

1. echo information is added from previous frames
2. specular surfaces are presented more completely
3. speckle reduction
4. surfaces are interogated at more than one angle

Answers are locked. Please click here to buy them. 99) The ________ format determines the starting points and paths for the individual scan.

1. location
2. display
3. scan
4. image

Answers are locked. Please click here to buy them. 100) The attenuation of a 5.0 MHz transducer at a depth of 4cm is _____dB.

1. 6 dB
2. 10 dB
3. 20 dB
4. 16. dB`

Answers are locked. Please click here to buy them. 101) The PRF is ________ Hz if ther are 30 fram per secon and 40 lines per frame.

1. 12,000
2. 1200
3. 12
4. 120

Answers are locked. Please click here to buy them. 102) Which resolution depends on penetration depth, lines per frame, and the number of focuses.

1. Temporal
2. Contrast
3. Detail
4. Axial

Answers are locked. Please click here to buy them. 103) A _______ scan is shaped like a slice of pie?

1. convex
2. curivilinear
3. sector
4. linear

Answers are locked. Please click here to buy them. 104) The functions of a beam former aer all of the following except:

1. compress the dynamic range
2. direct, focus, and apodize the transmitted beam
3. determine the PRF
4. compensate for attenuation

Answers are locked. Please click here to buy them. 105) How are axial and lateral resolutions artifactual?

1. Two adjacent structures seen as one
2. increase from actual size of structure
3. Failura to resolve a mass due to loss of detail
4. All of the above

Answers are locked. Please click here to buy them. 106) Stiffer media have _____ sound speeds.

1. Stiffness doesn't change the the propagation speed
2. sound cannot propagate through stiffer media
3. higher
4. lower

Answers are locked. Please click here to buy them. 107) As sound travels, the reduction in amplitude and intensity of the wave is called____.

1. reflection
2. scattering
3. attenuation
4. absorption

Answers are locked. Please click here to buy them. 108) What is the wavelength of a wave with an unknown frequency traveling in soft tissue?

1. .51 m/s
2. .51 pascals
3. 51 watts
4. .51 mm

Answers are locked. Please click here to buy them. 109) Which of the following is not a form of reverberation?

1. comet-tail
2. mirrior image
3. ring-down
4. speckle

Answers are locked. Please click here to buy them. 110) Propagations speed is primaritly determined by the _____ of the medium.

1. thickness
2. stiffness
3. density
4. water

Answers are locked. Please click here to buy them. 111) _______ is the even and odd multiples of the fundamental frequency.

1. bandwidth
2. mechancial waves
3. harmonics
4. side lobes

Answers are locked. Please click here to buy them. 112) Attenuation increases with increasing ______.

1. pressure
2. frequency
3. power
4. wavelength

Answers are locked. Please click here to buy them. 113) A _____ impedance of the transducer element allows more energy to transmit into the patient.

1. faster
2. slower
3. lower
4. higher

Answers are locked. Please click here to buy them. 114) Which resolution depends on penetration depth, lines per frame and the number of focuses?

1. axial
2. temporal
3. contrast
4. detail

Answers are locked. Please click here to buy them. 115) The most common artifact encounter in Doppler US is ________.

1. clutter
2. range ambiguity
3. aliasing
4. mirror image

Answers are locked. Please click here to buy them. 116) What are the two key issues concerning US data?

1. storage and displaying
2. receiving and storage
3. storage and compression
4. compression and displaying

Answers are locked. Please click here to buy them. 117) 20 kHz is equal to _____ Hz.

1. 200,000
2. 2000
3. 200
4. 20,000

Answers are locked. Please click here to buy them. 118) What is the attenuation coefficient for a 5. MHz transducer in soft tissue.

1. .25 dB/cm
2. 10. dB/cm
3. .1 dB/cm
4. 2.5 dB/cm

Answers are locked. Please click here to buy them. 119) The SPL will increase with all of the following except?

1. Number of cycles in the pulse
2. wavelength
3. frequency
4. None of the above

Answers are locked. Please click here to buy them. 120) Which of the following is not an image artifact?

1. Incorrect respresentation of motion in color
2. Anything not properly indicative of teh structures imaged
3. Errors in presentation of anatomic structures
4. None of the above

Answers are locked. Please click here to buy them. 121) The location of each dot corresponds to the _______ of the echo to return.

1. strength
2. pulse
3. time
4. frequency

Answers are locked. Please click here to buy them. 122) If the beam power increases, intensity will ____.

1. double
2. remain unchanged
3. decreased
4. increased

Answers are locked. Please click here to buy them. 123) Log (x/y) equals?

1. log × + log y
2. log × - log y
3. log × = log y
4. answer is not here

Answers are locked. Please click here to buy them. 124) Select the sequence that appears in increasing order.

1. milli, hecto, centi, deci, nano, giga
2. centi, deci, deca, hecto
3. namo, milli, micro, deci, deca, mega
4. mega, kilo, hecto, milli, giga

Answers are locked. Please click here to buy them. 125) The assumptions in teh design of sonographic instruments include all of the following except?

1. amplitude and intensity are properties of the structure
2. sound travels in a straight line
3. echoes originate from objects located on teh beam axis
4. sound travels at different speeds in soft tissues

Answers are locked. Please click here to buy them. 126) Which of the following approaches would yield the best imaging results on a large, difficult to image patient?

1. 6MHz transmit and recieive,.8 cm aperture
2. 1.4 MHz transmit, 2.8 Mhz receive, 1 cm aperture
3. 2MHz transmit, 4MHz receive, 1.8 cm aperture
4. 2.5 MHz transmit and receive and 2, cm aperture

Answers are locked. Please click here to buy them. 127) All of the following are true about a wide dynamic range except:

1. perferred for imaging abdominal organs
2. low contrast
3. high contrast
4. many shades of gray

Answers are locked. Please click here to buy them. 128) Which of the following would likely demonstrate acoustic enhancement?

1. Solid mass
2. gallstone
3. gallbladder
4. complex mass

Answers are locked. Please click here to buy them. 129) The distance to a reflector in soft tissue is 15 cm. What is th round trip time to this depth?

1. 11.5 micro second
2. 19.5 micro second
3. 195. micro second
4. 1.15 micro second

Answers are locked. Please click here to buy them. 130) If Frequency increases, period will _____.

1. increase
2. None of the above
3. decrease
4. remain unchanged

Answers are locked. Please click here to buy them.

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