Image Production -- Final Test
Ring artifact can be the result of:
A. Averaging multiple tissue types into one voxel
B. Using a large display field-of-view
C. Leaving the patient's arms in the exposure field
D. Miscalibration of a detector element - correct answer ✔✔answer is what
Pitch is an acquisition variable defined for which acquisition mode?
Axial Mode
Helical Mode
Volume Mode - correct answer ✔✔
A new CT protocol calls for imaging the entire Circle of Willis in one x-ray exposure in one tube rotation.
What scanning mode would meet this requirement?
Axial Scanning
Helical Scanning
Volume Scanning - correct answer ✔✔
A protocol designed for viewing boney injuries to the thorax should use what kind of reconstruction
algorithm?
A. Edge-enhancing algorithms
B. Smoothing algorithms
C. Standard algorithms
D. Soft-tissue algorithms - correct answer ✔✔
Consider the following scenario.
, Several QC tests were performed on four different scanners. Based on the results of these tests, which
scanner has the highest spatial resolution?
A. Water phantom average = - 0.5 HU Water phantom standard deviation = 1.2 Line pairs = 12 lp/cm
B. Water phantom average = 1.0 HU Water phantom standard deviation = 3.1 Line pairs = 14 lp/cm
C. Water phantom average = -11 HU Water phantom standard deviation = 0.2 Line pairs = 13 lp/cm
D. Water phantom average = 2.0 HU Water phantom standard deviation = 2.0 Line pairs = 10 lp/cm -
correct answer ✔✔
Which of these detector configurations have the most total beam coverage?
A. 1 mm x 16 rows
B. 2 mm x 8 rows
C. 4 mm x 4 rows
D. 3 mm x 7 rows - correct answer ✔✔
Raw data is also called:
A. Scan data
B. Image data
C. Reconstructed data
D. Processed data - correct answer ✔✔
Considering the variables below, which of these statements describe the resulting volume of scan data?
Pitch = 1
Acquisition thickness = 1.5 mm
Rotation time = 1 second
Maximum tube current = 300 mA
A. There will be additional views of the same positions in the scan data
B. There will be missing views in the scan data
C. There will be overlap and missing views in the scan data
Ring artifact can be the result of:
A. Averaging multiple tissue types into one voxel
B. Using a large display field-of-view
C. Leaving the patient's arms in the exposure field
D. Miscalibration of a detector element - correct answer ✔✔answer is what
Pitch is an acquisition variable defined for which acquisition mode?
Axial Mode
Helical Mode
Volume Mode - correct answer ✔✔
A new CT protocol calls for imaging the entire Circle of Willis in one x-ray exposure in one tube rotation.
What scanning mode would meet this requirement?
Axial Scanning
Helical Scanning
Volume Scanning - correct answer ✔✔
A protocol designed for viewing boney injuries to the thorax should use what kind of reconstruction
algorithm?
A. Edge-enhancing algorithms
B. Smoothing algorithms
C. Standard algorithms
D. Soft-tissue algorithms - correct answer ✔✔
Consider the following scenario.
, Several QC tests were performed on four different scanners. Based on the results of these tests, which
scanner has the highest spatial resolution?
A. Water phantom average = - 0.5 HU Water phantom standard deviation = 1.2 Line pairs = 12 lp/cm
B. Water phantom average = 1.0 HU Water phantom standard deviation = 3.1 Line pairs = 14 lp/cm
C. Water phantom average = -11 HU Water phantom standard deviation = 0.2 Line pairs = 13 lp/cm
D. Water phantom average = 2.0 HU Water phantom standard deviation = 2.0 Line pairs = 10 lp/cm -
correct answer ✔✔
Which of these detector configurations have the most total beam coverage?
A. 1 mm x 16 rows
B. 2 mm x 8 rows
C. 4 mm x 4 rows
D. 3 mm x 7 rows - correct answer ✔✔
Raw data is also called:
A. Scan data
B. Image data
C. Reconstructed data
D. Processed data - correct answer ✔✔
Considering the variables below, which of these statements describe the resulting volume of scan data?
Pitch = 1
Acquisition thickness = 1.5 mm
Rotation time = 1 second
Maximum tube current = 300 mA
A. There will be additional views of the same positions in the scan data
B. There will be missing views in the scan data
C. There will be overlap and missing views in the scan data
