1. Which type of scan is typically performed to assess for a suspected
stroke?
A. Non-contrast brain CT
B. Cardiac CT
C. CT angiography
D. Abdominal CT scan
Answer: A) Non-contrast brain CT
Rationale: A non-contrast brain CT is commonly used in acute stroke
cases to quickly rule out hemorrhagic stroke (bleeding in the brain).
Contrast is usually not needed initially unless there are concerns about
ischemic stroke or other abnormalities.
2. Which of the following factors can influence the radiation dose in a
CT scan?
A. Slice thickness
B. Scan time
C. Patient size
D. All of the above
Answer: D) All of the above
,Rationale: Radiation dose in CT scans can be influenced by multiple
factors, including slice thickness, scan time, and patient size. Adjusting
these parameters helps to balance image quality and minimize dose.
3. Which of the following is an example of an artifact commonly seen in
CT imaging?
A. Decreased contrast resolution
B. Motion artifact due to patient movement
C. Increased slice thickness
D. Improved tissue differentiation
Answer: B) Motion artifact due to patient movement
Rationale: Motion artifacts are common in CT imaging when the
patient moves during the scan. This can result in blurred or distorted
images, especially in fast-moving organs like the heart and lungs.
4. Which of the following is a benefit of using a low-dose CT protocol
in imaging?
A. Increased image resolution
B. Reduced radiation exposure to the patient
C. Faster scan times
D. Enhanced contrast of soft tissues
Answer: B) Reduced radiation exposure to the patient
, Rationale: Low-dose CT protocols are designed to minimize radiation
exposure while maintaining diagnostic quality, making them especially
useful in pediatric and follow-up imaging.
5. Which of the following conditions would most benefit from a CT
urography scan?
A. Coronary artery disease
B. Kidney stones
C. Brain tumor
D. Pulmonary embolism
Answer: B) Kidney stones
Rationale: CT urography is an imaging technique used to evaluate the
kidneys, ureters, and bladder, often for conditions like kidney stones,
hematuria, and urinary tract abnormalities.
6. What does the term "artifact" refer to in CT imaging?
A. The standard procedure for a CT scan
B. An image distortion or error that reduces image quality
C. The method of enhancing images
D. The process of scanning a patient
Answer: B) An image distortion or error that reduces image quality
Rationale: An artifact in CT imaging refers to any distortion or
unwanted feature that can obscure the diagnostic quality of the images.
stroke?
A. Non-contrast brain CT
B. Cardiac CT
C. CT angiography
D. Abdominal CT scan
Answer: A) Non-contrast brain CT
Rationale: A non-contrast brain CT is commonly used in acute stroke
cases to quickly rule out hemorrhagic stroke (bleeding in the brain).
Contrast is usually not needed initially unless there are concerns about
ischemic stroke or other abnormalities.
2. Which of the following factors can influence the radiation dose in a
CT scan?
A. Slice thickness
B. Scan time
C. Patient size
D. All of the above
Answer: D) All of the above
,Rationale: Radiation dose in CT scans can be influenced by multiple
factors, including slice thickness, scan time, and patient size. Adjusting
these parameters helps to balance image quality and minimize dose.
3. Which of the following is an example of an artifact commonly seen in
CT imaging?
A. Decreased contrast resolution
B. Motion artifact due to patient movement
C. Increased slice thickness
D. Improved tissue differentiation
Answer: B) Motion artifact due to patient movement
Rationale: Motion artifacts are common in CT imaging when the
patient moves during the scan. This can result in blurred or distorted
images, especially in fast-moving organs like the heart and lungs.
4. Which of the following is a benefit of using a low-dose CT protocol
in imaging?
A. Increased image resolution
B. Reduced radiation exposure to the patient
C. Faster scan times
D. Enhanced contrast of soft tissues
Answer: B) Reduced radiation exposure to the patient
, Rationale: Low-dose CT protocols are designed to minimize radiation
exposure while maintaining diagnostic quality, making them especially
useful in pediatric and follow-up imaging.
5. Which of the following conditions would most benefit from a CT
urography scan?
A. Coronary artery disease
B. Kidney stones
C. Brain tumor
D. Pulmonary embolism
Answer: B) Kidney stones
Rationale: CT urography is an imaging technique used to evaluate the
kidneys, ureters, and bladder, often for conditions like kidney stones,
hematuria, and urinary tract abnormalities.
6. What does the term "artifact" refer to in CT imaging?
A. The standard procedure for a CT scan
B. An image distortion or error that reduces image quality
C. The method of enhancing images
D. The process of scanning a patient
Answer: B) An image distortion or error that reduces image quality
Rationale: An artifact in CT imaging refers to any distortion or
unwanted feature that can obscure the diagnostic quality of the images.
