CT registry review questions with correct detailed solutions
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1. Which of the following statements is false?
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a. The elimination of superimposed structures is a distinct advantage of CT over plain film
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imaging.
b. CT images possess superior quality.
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c. Contrast resolution is approximately 10x better with CT compared to plain film imaging.
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d. Spatial resolution is approximately 10x better with CT compared to plain film imaging. -
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✔✔d
2. Which type of beam coverage will result in the greatest production of scatter radiation?
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a. Fan beam
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b. Pencil beam
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c. Area beam
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d. Cone beam - ✔✔d
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Which type of beam coverage is typical of SDCT systems?
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a. Fan beam
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b. Pencil beam
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,c. Area beam
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d. Cone beam - ✔✔a
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Which type of beam coverage is typical of MDCT systems?
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a. Fan beam
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b. Pencil beam
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c. Area beam
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d. Cone beam - ✔✔d
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"Translate-Rotate" is in reference to which of the following generations of CT geometries? || || || || || || || || || || || ||
i. First
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ii. Second ||
|| iii. Third || ||
iv. Fourth ||
a. 1 thru 4
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|| b. 1&2only ||
|| c. 3 only || ||
d. 4 only - ✔✔b
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Which of the following structures possesses the ability to attenuate radiation the greatest?
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a. Air ||
b. Muscle ||
,c. Bone
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d. Soft tissue - ✔✔c
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Which of the following structures is represented by the highest Hounsfield Unit?
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|| a. Air ||
b. Muscle
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c. Bone
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d. Soft tissue - ✔✔c
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Which of the following HU values would be typical of a metallic pacemaker?
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a. 2000
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b. 1000
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c. -500
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d. -2500 - ✔✔a
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The process in CT by which different tissue attenuation values are averaged to produce one
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less accurate pixel reading is most likely defined as which of the following?
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a. Interpolation
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b. Extrapolation
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c. Volume averaging
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d. Beam hardening - ✔✔c
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Which of the following pieces of CT hardware is principally responsible for determining
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slice thickness when the system is SDCT?
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, a. Pre-detector collimator
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b. Pre-patient collimator
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c. The cone beam collimator
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d. The fan beam collimator - ✔✔b
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From the choices below, please select the best way to minimize the problem associated with
|| || || || || || || || || || || || || || ||
Partial Volume Averaging. || ||
a. Select an alternative algorithm
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b. Increase the slice thickness
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c. Decrease the slice thickness
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d. Increase procedure mA - ✔✔c
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Segmentation and averaging of the data results in what kind of data? || || || || || || || || || || ||
1. scan data
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2. Image data
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3. Raw data
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a. 2 only
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b. 3 only
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c. 1&3only d. 1&2only - ✔✔a
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As associated with which of the following, does raw data become image data?
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a. The detector system
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1. Which of the following statements is false?
|| || || || || || ||
a. The elimination of superimposed structures is a distinct advantage of CT over plain film
|| || || || || || || || || || || || || ||
imaging.
b. CT images possess superior quality.
|| || || || ||
c. Contrast resolution is approximately 10x better with CT compared to plain film imaging.
|| || || || || || || || || || || || ||
d. Spatial resolution is approximately 10x better with CT compared to plain film imaging. -
|| || || || || || || || || || || || || || ||
✔✔d
2. Which type of beam coverage will result in the greatest production of scatter radiation?
|| || || || || || || || || || || || || ||
a. Fan beam
|| ||
b. Pencil beam
|| ||
c. Area beam
|| ||
d. Cone beam - ✔✔d
|| || || ||
Which type of beam coverage is typical of SDCT systems?
|| || || || || || || || ||
a. Fan beam
|| ||
b. Pencil beam
|| ||
,c. Area beam
|| ||
d. Cone beam - ✔✔a
|| || || ||
Which type of beam coverage is typical of MDCT systems?
|| || || || || || || || ||
a. Fan beam
|| ||
b. Pencil beam
|| ||
c. Area beam
|| ||
d. Cone beam - ✔✔d
|| || || ||
"Translate-Rotate" is in reference to which of the following generations of CT geometries? || || || || || || || || || || || ||
i. First
||
ii. Second ||
|| iii. Third || ||
iv. Fourth ||
a. 1 thru 4
|| || ||
|| b. 1&2only ||
|| c. 3 only || ||
d. 4 only - ✔✔b
|| || || ||
Which of the following structures possesses the ability to attenuate radiation the greatest?
|| || || || || || || || || || || || ||
a. Air ||
b. Muscle ||
,c. Bone
||
d. Soft tissue - ✔✔c
|| || || ||
Which of the following structures is represented by the highest Hounsfield Unit?
|| || || || || || || || || || ||
|| a. Air ||
b. Muscle
||
c. Bone
||
d. Soft tissue - ✔✔c
|| || || ||
Which of the following HU values would be typical of a metallic pacemaker?
|| || || || || || || || || || || || ||
a. 2000
||
b. 1000
|| ||
c. -500
|| ||
d. -2500 - ✔✔a
|| || ||
The process in CT by which different tissue attenuation values are averaged to produce one
|| || || || || || || || || || || || || || ||
less accurate pixel reading is most likely defined as which of the following?
|| || || || || || || || || || || ||
a. Interpolation
|| ||
b. Extrapolation
||
c. Volume averaging
|| || ||
d. Beam hardening - ✔✔c
|| || || ||
Which of the following pieces of CT hardware is principally responsible for determining
|| || || || || || || || || || || || ||
slice thickness when the system is SDCT?
|| || || || || ||
, a. Pre-detector collimator
|| ||
b. Pre-patient collimator
|| ||
c. The cone beam collimator
|| || || ||
d. The fan beam collimator - ✔✔b
|| || || || || ||
From the choices below, please select the best way to minimize the problem associated with
|| || || || || || || || || || || || || || ||
Partial Volume Averaging. || ||
a. Select an alternative algorithm
|| || || ||
b. Increase the slice thickness
|| || || ||
c. Decrease the slice thickness
|| || || ||
d. Increase procedure mA - ✔✔c
|| || || || ||
Segmentation and averaging of the data results in what kind of data? || || || || || || || || || || ||
1. scan data
|| ||
2. Image data
|| ||
3. Raw data
|| ||
a. 2 only
|| ||
b. 3 only
|| ||
c. 1&3only d. 1&2only - ✔✔a
|| || || || ||
As associated with which of the following, does raw data become image data?
|| || || || || || || || || || || ||
a. The detector system
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