1
Edelman SPI Review Questions and Answers |
100% Verified | Updated 2025 Edition
1. What are typical clinical doppler frequencies? - ANSWER 1-10,000Hz
2. What doppler angle is most inaccurate? <3 - ANSWER 60-75 degrees
3. What can be changed that would not cause any change in a hard copy image
output? - ANSWER Display brightness and contrast
4. A quality assurance program: - ANSWER Is needed by all labs
5. What is the actual time that an US machine is creating a pulse? - ANSWER
Pulse duration
6. The angle of incidence of an US beam is perpendicular to an interface. The
two media have the same propagation speeds. What process cannot occur? -
ANSWER Refraction
7. What component of the US unit contains the memory bank? - ANSWER
Scan converter
8. An US wave travels through two media and has attenuation of 3dB in the
first and 5dB in the second. What is the total attenuation? - ANSWER 8dB
9. According to the AIUM statement on bioeffects, there have een no
confirmed bioeffects below the intensities of __________ watts per square
centimeter SPTA. - ANSWER 0.1
10.Fill-in of an anechoic structure such as a cyst is known as? - ANSWER
Partial volume artifact, slice thickness artifact, section thickness artifact
11.What is the range of frequencies created by medical diagnostic doppler
transducers? - ANSWER 2-10MHz
12.Doppler shifts are always created when the source and receiver are in motion
relative to each other (TRUE OR FALSE) - ANSWER False
, 2
13.What is the significance of gray scale variation in the spectrum of a pulsed
wave doppler display? - ANSWER It represents the number of red blood
cells creating the reflection
14.Which set of property of a test phantom is most relevant when assessing
depth calibration accuracy? - ANSWER Reflector spacing and propagation
speed
15.Assuming a constant frequency, what happens if the diameter of an
unfocused circular transducer is increased? - ANSWER
16.The relative output of an US instrument is calibrated in dB and the operator
by 60 dB. The beam intensity is increased by? - ANSWER One million
times
17.What is the most typical doppler shift measured clinically? - ANSWER
2kHz
18.Doppler shifts always occur if the source and receiver are in motion relative
to each other (TRUE OR FALSE) - ANSWER False
19.Doppler shifts always occur if the source and observer are in motion relative
to each other and the angle between the motion and the sound beam is
90degrees (TRUE OR FALSE) - ANSWER False
20.Doppler shifts always occur if the source and observer are in motion relative
to each other and the angle between the motion and the sound beam is not
90degrees (TRUE OR FALSE) - ANSWER True
21.When the sound source and the receiver are not moving directly towards or
away from each other, the _________ of the angle between them enters into
the calculation of doppler shift - ANSWER Cosine
22.The range equation related distance from the reflector to ________ and
________. - ANSWER Time-of-flight, propagation speed
23.In soft tissue: Distance traveled = ___________ x round trip time -
ANSWER Propagation Speed
, 3
24.With the presence of ______ we see more boundaries than there are
reflecting surfaces - ANSWER Reverberations
25.What is another name for longitudinal resolution? - ANSWER Axial &
Depth
26.What are the units of longitudinal resolution? - ANSWER Feet
27.What is the best lateral resolution? - ANSWER 0.06cm
28.If the spatial pulse length is 10mm, what is the axial resolution? - ANSWER
0.5cm
29.If the frequency is decreased, the numerical value of the radial resolution is?
- ANSWER Increased
30.A transducer ______ one form of ______ into another - ANSWER Converts;
energy
31.The production of a voltage from the application of a pressure is called? -
ANSWER Piezoelectricity
32.What is the production of deformation from voltage called? - ANSWER
Piezoelectricity
33.What is not a part of a transducer? - ANSWER A/D converter
34.What is the fraunhofer? - ANSWER Far zone
35.If we increase the frequency, the near zone length is: - ANSWER Increased
36.If the transducer aperture increases, the lateral resolution at its smallest
dimension is: - ANSWER Increased
37.If we increase the transducer diameter, the beam diameter in the far zone is:
- ANSWER Decreased
38.At the focus, the beam diameter is ________ the transducer diameter -
ANSWER Half
, 4
39.Lateral resolution can be improved by? - ANSWER Focusing
40.The digital scan converter has a number of pixels assigned to each bit
(TRUE OR FALSE) - ANSWER False
41.The more bits per pixel: - ANSWER The more shades of gray
42.The more pixels per inch: - ANSWER The better is the spatial resolution
43.Which of the following is the first adjustment made when an entire image is
too dark? - ANSWER Amplification
44.What is the elimination of voltages that do not exceed a certain level? -
ANSWER Reject
45.What is the name o the receiver function that corrects for attenuation? -
ANSWER Compensation
46.The process of reducing the difference between the smallest and the largest
voltages is called _________ - ANSWER Compression
47.If the lines per frame is increased while the imaging depth is unchanged
then: - ANSWER The frame rate decreases
48.A mirror image artifact can appear along side of the true anatomy (TRUE
OR FALSE) - ANSWER False
49.Enhancement, multipath and side lobes result in: - ANSWER Artifact
50.The propagation speed of US in the AIUM test object is: - ANSWER 1.54
mm/us
51.If wires in an AIUM test object do not appear in the same pace as on the
display, what is amiss? - ANSWER Registration accuracy
52.How many data bits are needed to represent 46 gray shades? - ANSWER 6
53.The fresnel is the? - ANSWER Near zone
54.What is associated with cavitation? <3 - ANSWER Mechanical index
Edelman SPI Review Questions and Answers |
100% Verified | Updated 2025 Edition
1. What are typical clinical doppler frequencies? - ANSWER 1-10,000Hz
2. What doppler angle is most inaccurate? <3 - ANSWER 60-75 degrees
3. What can be changed that would not cause any change in a hard copy image
output? - ANSWER Display brightness and contrast
4. A quality assurance program: - ANSWER Is needed by all labs
5. What is the actual time that an US machine is creating a pulse? - ANSWER
Pulse duration
6. The angle of incidence of an US beam is perpendicular to an interface. The
two media have the same propagation speeds. What process cannot occur? -
ANSWER Refraction
7. What component of the US unit contains the memory bank? - ANSWER
Scan converter
8. An US wave travels through two media and has attenuation of 3dB in the
first and 5dB in the second. What is the total attenuation? - ANSWER 8dB
9. According to the AIUM statement on bioeffects, there have een no
confirmed bioeffects below the intensities of __________ watts per square
centimeter SPTA. - ANSWER 0.1
10.Fill-in of an anechoic structure such as a cyst is known as? - ANSWER
Partial volume artifact, slice thickness artifact, section thickness artifact
11.What is the range of frequencies created by medical diagnostic doppler
transducers? - ANSWER 2-10MHz
12.Doppler shifts are always created when the source and receiver are in motion
relative to each other (TRUE OR FALSE) - ANSWER False
, 2
13.What is the significance of gray scale variation in the spectrum of a pulsed
wave doppler display? - ANSWER It represents the number of red blood
cells creating the reflection
14.Which set of property of a test phantom is most relevant when assessing
depth calibration accuracy? - ANSWER Reflector spacing and propagation
speed
15.Assuming a constant frequency, what happens if the diameter of an
unfocused circular transducer is increased? - ANSWER
16.The relative output of an US instrument is calibrated in dB and the operator
by 60 dB. The beam intensity is increased by? - ANSWER One million
times
17.What is the most typical doppler shift measured clinically? - ANSWER
2kHz
18.Doppler shifts always occur if the source and receiver are in motion relative
to each other (TRUE OR FALSE) - ANSWER False
19.Doppler shifts always occur if the source and observer are in motion relative
to each other and the angle between the motion and the sound beam is
90degrees (TRUE OR FALSE) - ANSWER False
20.Doppler shifts always occur if the source and observer are in motion relative
to each other and the angle between the motion and the sound beam is not
90degrees (TRUE OR FALSE) - ANSWER True
21.When the sound source and the receiver are not moving directly towards or
away from each other, the _________ of the angle between them enters into
the calculation of doppler shift - ANSWER Cosine
22.The range equation related distance from the reflector to ________ and
________. - ANSWER Time-of-flight, propagation speed
23.In soft tissue: Distance traveled = ___________ x round trip time -
ANSWER Propagation Speed
, 3
24.With the presence of ______ we see more boundaries than there are
reflecting surfaces - ANSWER Reverberations
25.What is another name for longitudinal resolution? - ANSWER Axial &
Depth
26.What are the units of longitudinal resolution? - ANSWER Feet
27.What is the best lateral resolution? - ANSWER 0.06cm
28.If the spatial pulse length is 10mm, what is the axial resolution? - ANSWER
0.5cm
29.If the frequency is decreased, the numerical value of the radial resolution is?
- ANSWER Increased
30.A transducer ______ one form of ______ into another - ANSWER Converts;
energy
31.The production of a voltage from the application of a pressure is called? -
ANSWER Piezoelectricity
32.What is the production of deformation from voltage called? - ANSWER
Piezoelectricity
33.What is not a part of a transducer? - ANSWER A/D converter
34.What is the fraunhofer? - ANSWER Far zone
35.If we increase the frequency, the near zone length is: - ANSWER Increased
36.If the transducer aperture increases, the lateral resolution at its smallest
dimension is: - ANSWER Increased
37.If we increase the transducer diameter, the beam diameter in the far zone is:
- ANSWER Decreased
38.At the focus, the beam diameter is ________ the transducer diameter -
ANSWER Half
, 4
39.Lateral resolution can be improved by? - ANSWER Focusing
40.The digital scan converter has a number of pixels assigned to each bit
(TRUE OR FALSE) - ANSWER False
41.The more bits per pixel: - ANSWER The more shades of gray
42.The more pixels per inch: - ANSWER The better is the spatial resolution
43.Which of the following is the first adjustment made when an entire image is
too dark? - ANSWER Amplification
44.What is the elimination of voltages that do not exceed a certain level? -
ANSWER Reject
45.What is the name o the receiver function that corrects for attenuation? -
ANSWER Compensation
46.The process of reducing the difference between the smallest and the largest
voltages is called _________ - ANSWER Compression
47.If the lines per frame is increased while the imaging depth is unchanged
then: - ANSWER The frame rate decreases
48.A mirror image artifact can appear along side of the true anatomy (TRUE
OR FALSE) - ANSWER False
49.Enhancement, multipath and side lobes result in: - ANSWER Artifact
50.The propagation speed of US in the AIUM test object is: - ANSWER 1.54
mm/us
51.If wires in an AIUM test object do not appear in the same pace as on the
display, what is amiss? - ANSWER Registration accuracy
52.How many data bits are needed to represent 46 gray shades? - ANSWER 6
53.The fresnel is the? - ANSWER Near zone
54.What is associated with cavitation? <3 - ANSWER Mechanical index
