Question 1

Which of the following digitally filters,detects,and compresses echo data?

Accepted Answer

A)  Beam former. 
B)  Summer. 
C)  Signal processor. 
D)  Digitizer. 
A)  Beam former. 
B)  Summer. 
C)  Signal processor. 
D)  Digitizer. C

Question 2

Increasing the frame rate improves ________.

Accepted Answer

A)  axial resolution 
B)  detail resolution 
C)  penetration depth 
D)  temporal resolution 
A)  axial resolution 
B)  detail resolution 
C)  penetration depth 
D)  temporal resolution D

Question 3

If the operating frequency is reduced,________.

Accepted Answer

A)  frame rate increases 
B)  axial resolution improves 
C)  pulse repetition frequency increases 
D)  maximum penetration depth increases 
A)  frame rate increases 
B)  axial resolution improves 
C)  pulse repetition frequency increases 
D)  maximum penetration depth increases D

Question 4

Which of the following reformats data into image form for processing,storage and display?

Accepted Answer

A)  Summer. 
B)  Beam former. 
C)  Digitizer. 
D)  Signal processor. 
A)  Summer. 
B)  Beam former. 
C)  Digitizer. 
D)  Signal processor.

Question 5

The ________ determines the brightness of the echoes on the display.

Accepted Answer

A)  analog-to-digital converter 
B)  digitizer 
C)  digital-to-analog converter 
D)  cathode ray tube 
A)  analog-to-digital converter 
B)  digitizer 
C)  digital-to-analog converter 
D)  cathode ray tube

Question 6

Maximum amplifier gain is determined by ________.

Accepted Answer

A)  output 
B)  input 
C)  noise 
D)  manufacturer 
A)  output 
B)  input 
C)  noise 
D)  manufacturer

Question 7

Increasing frame rate improves

Accepted Answer

A)  axial resolution 
B)  lateral resolution 
C)  temporal resolution 
D)  contrast resolution 
A)  axial resolution 
B)  lateral resolution 
C)  temporal resolution 
D)  contrast resolution

Question 8

Which of the following constitutes a reception channel?

Accepted Answer

A)  Elements, pulser, signal processor, and delay path. 
B)  Beam former, pulser, amplifier, and scan converter. 
C)  Elements, amplifier, digitizer, and delay path. 
D)  Beam former, signal processor, image processor, and display. 
A)  Elements, pulser, signal processor, and delay path. 
B)  Beam former, pulser, amplifier, and scan converter. 
C)  Elements, amplifier, digitizer, and delay path. 
D)  Beam former, signal processor, image processor, and display.

Question 9

Which resolution depends on penetration depth,lines per frame,and the number of focuses?

Accepted Answer

A)  Axial. 
B)  Temporal. 
C)  Contrast. 
D)  Detail. 
A)  Axial. 
B)  Temporal. 
C)  Contrast. 
D)  Detail.

Question 10

The ________ is where the action originates.

Accepted Answer

A)  signal processor 
B)  code excitation 
C)  beam former 
D)  transmit/receive (T/R) switch 
A)  signal processor 
B)  code excitation 
C)  beam former 
D)  transmit/receive (T/R) switch

Question 11

Volume imaging is accomplished by ________.

Accepted Answer

A)  acquiring many parallel two-dimensional scans 
B)  scanning from different angles 
C)  spatial compounding 
D)  expanding beyond the normal limits of the transducer 
A)  acquiring many parallel two-dimensional scans 
B)  scanning from different angles 
C)  spatial compounding 
D)  expanding beyond the normal limits of the transducer

Question 12

Filtering of the sound beam is used to eliminate ________.

Accepted Answer

A)  side lobe artifacts 
B)  secondary frequencies 
C)  the fundamental frequency 
D)  frequencies outside of the bandwidth 
A)  side lobe artifacts 
B)  secondary frequencies 
C)  the fundamental frequency 
D)  frequencies outside of the bandwidth

Question 13

Which of the following is not an advantage of harmonic imaging?

Accepted Answer

A)  Wide primary beam. 
B)  Increased lateral resolution. 
C)  Elimination of grating lobe artifacts. 
D)  Reduction in superficial reverberation artifacts. 
A)  Wide primary beam. 
B)  Increased lateral resolution. 
C)  Elimination of grating lobe artifacts. 
D)  Reduction in superficial reverberation artifacts.

Question 14

Holding and displaying one frame out of the sequence is known as ________.

Accepted Answer

A)  cine loop 
B)  freeze frame 
C)  the frame rate 
D)  a scan line 
A)  cine loop 
B)  freeze frame 
C)  the frame rate 
D)  a scan line

Question 15

Golay codes ________.

Accepted Answer

A)  are coding schemes using "gaps" or missing pulses 
B)  use pairs of transmitted pulses with the second being a bipolar sequence 
C)  are coding schemes that stack up the individual pulses 
D)  reduce speckle, which improves contrast resolution 
A)  are coding schemes using "gaps" or missing pulses 
B)  use pairs of transmitted pulses with the second being a bipolar sequence 
C)  are coding schemes that stack up the individual pulses 
D)  reduce speckle, which improves contrast resolution

Question 16

To avoid echo misplacement ________.

Accepted Answer

A)  penetration depth is increased 
B)  multiple focal zones should be utilized 
C)  a matching layer is added to the transducer element 
D)  all echoes must be received before another pulse is emitted 
A)  penetration depth is increased 
B)  multiple focal zones should be utilized 
C)  a matching layer is added to the transducer element 
D)  all echoes must be received before another pulse is emitted

Question 17

________ determines how echo data stored in memory appear on the display.

Accepted Answer

A)  Preprocessing 
B)  Postprocessing 
C)  Dynamic range 
D)  Color 
A)  Preprocessing 
B)  Postprocessing 
C)  Dynamic range 
D)  Color

Question 18

Retention of previous frames while new echo information is added in the same scanning plane is called ________.

Accepted Answer

A)  harmonic imaging 
B)  panoramic imaging 
C)  pixel interpolation 
D)  spatial compounding 
A)  harmonic imaging 
B)  panoramic imaging 
C)  pixel interpolation 
D)  spatial compounding

Question 19

Which three-dimensional display appears similar to a radiograph?

Accepted Answer

A)  Pulse inversion. 
B)  Surface rendering. 
C)  Transparent views. 
D)  Panoramic images. 
A)  Pulse inversion. 
B)  Surface rendering. 
C)  Transparent views. 
D)  Panoramic images.

Question 20

The averaging of sequential frames together to provide a smoother image appearance is called ________.

Accepted Answer

A)  persistence 
B)  multi-focus 
C)  pixel interpolation 
D)  spatial compounding 
A)  persistence 
B)  multi-focus 
C)  pixel interpolation 
D)  spatial compounding

Which of the following digitally filters,detects,and compresses echo data?

Increasing the frame rate improves ________.

If the operating frequency is reduced,________.

Which of the following reformats data into image form for processing,storage and display?

The ________ determines the brightness of the echoes on the display.

Maximum amplifier gain is determined by ________.

Increasing frame rate improves

Which of the following constitutes a reception channel?

Which resolution depends on penetration depth,lines per frame,and the number of focuses?

The ________ is where the action originates.

Volume imaging is accomplished by ________.

Filtering of the sound beam is used to eliminate ________.

Which of the following is not an advantage of harmonic imaging?

Holding and displaying one frame out of the sequence is known as ________.

Golay codes ________.

To avoid echo misplacement ________.

________ determines how echo data stored in memory appear on the display.

Retention of previous frames while new echo information is added in the same scanning plane is called ________.

Which three-dimensional display appears similar to a radiograph?

The averaging of sequential frames together to provide a smoother image appearance is called ________.

Introduction

Ultrasound

Transducers

Doppler Principles

Artifacts

Performance and Safety

Filters

Exam 4: Instruments

Which of the following digitally filters,detects,and compresses echo data?

Increasing the frame rate improves ________.

If the operating frequency is reduced,________.

Which of the following reformats data into image form for processing,storage and display?

The ________ determines the brightness of the echoes on the display.

Maximum amplifier gain is determined by ________.

Increasing frame rate improves

Which of the following constitutes a reception channel?

Which resolution depends on penetration depth,lines per frame,and the number of focuses?

The ________ is where the action originates.

Volume imaging is accomplished by ________.

Filtering of the sound beam is used to eliminate ________.

Which of the following is not an advantage of harmonic imaging?

Holding and displaying one frame out of the sequence is known as ________.

Golay codes ________.

To avoid echo misplacement ________.

________ determines how echo data stored in memory appear on the display.

Retention of previous frames while new echo information is added in the same scanning plane is called ________.

Which three-dimensional display appears similar to a radiograph?

The averaging of sequential frames together to provide a smoother image appearance is called ________.

Introduction

Ultrasound

Transducers

Doppler Principles

Artifacts

Performance and Safety

Filters