CT Image Production - Image
Processing
Which two algorithms are preferred for viewing bone? - correct answer ✔✔Edge-enhancing algorithms
and bone algorithms
The process of reconstruction in the CT computer system creates: - correct answer ✔✔Image data
Estimating an unknown value in a series of know values is a mathematical process called: - correct
answer ✔✔Interpolation
Which of the following accurately describes where raw CT data is stored?
1. it is not stored
2. in the CT computer system
3. PACS
4. Radiologists reading station - correct answer ✔✔In the CT computer system
What mathematical process prevents star-like artifacts from appearing on the CT images? - correct
answer ✔✔Back-projection filter
What three scan parameters can be changed retrospectively?
1. Scan start and end locations
2. Slice thickness
3. SFOV
4. DFOV
5. Acquisition thickness - correct answer ✔✔1, 2, and 4
, Different data sets were used to create two different coronal slices of the abdomen. One image appears
blurry while the other appears clear. What is the likely explanation for the poor image quality?
1. Incorrect algorithm selection in the axial data set
2. Incorrect reconstruction slice thickness in the axials data set
3. Incorrect FOV in the axial data set
4. Incorrect windowing in the coronal data set - correct answer ✔✔Incorrect reconstruction slice
thickness in the axial data set
Thicker slices are suitable for which of the following?
1. MPR
2. Abdominal imaging
3. Angio imagining
4. Thoracic imaging - correct answer ✔✔2 and 4
Thick reconstruction slices are not suitable for which of the following?
1. MPR
2. Angio imaging
3. Abdominal imaging
4. Thoracic imaging - correct answer ✔✔1 and 2
Using a larger reconstruction slice thickness results in which two of the following?
1. Decreased image noise
2. Decreased contrast
3. Decreased spatial resolution
Processing
Which two algorithms are preferred for viewing bone? - correct answer ✔✔Edge-enhancing algorithms
and bone algorithms
The process of reconstruction in the CT computer system creates: - correct answer ✔✔Image data
Estimating an unknown value in a series of know values is a mathematical process called: - correct
answer ✔✔Interpolation
Which of the following accurately describes where raw CT data is stored?
1. it is not stored
2. in the CT computer system
3. PACS
4. Radiologists reading station - correct answer ✔✔In the CT computer system
What mathematical process prevents star-like artifacts from appearing on the CT images? - correct
answer ✔✔Back-projection filter
What three scan parameters can be changed retrospectively?
1. Scan start and end locations
2. Slice thickness
3. SFOV
4. DFOV
5. Acquisition thickness - correct answer ✔✔1, 2, and 4
, Different data sets were used to create two different coronal slices of the abdomen. One image appears
blurry while the other appears clear. What is the likely explanation for the poor image quality?
1. Incorrect algorithm selection in the axial data set
2. Incorrect reconstruction slice thickness in the axials data set
3. Incorrect FOV in the axial data set
4. Incorrect windowing in the coronal data set - correct answer ✔✔Incorrect reconstruction slice
thickness in the axial data set
Thicker slices are suitable for which of the following?
1. MPR
2. Abdominal imaging
3. Angio imagining
4. Thoracic imaging - correct answer ✔✔2 and 4
Thick reconstruction slices are not suitable for which of the following?
1. MPR
2. Angio imaging
3. Abdominal imaging
4. Thoracic imaging - correct answer ✔✔1 and 2
Using a larger reconstruction slice thickness results in which two of the following?
1. Decreased image noise
2. Decreased contrast
3. Decreased spatial resolution
