Alberta Radiologic Technologist Certification
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which imaging modality is most appropriate for evaluating soft
tissue injuries of the knee?
a) X-ray
b) CT
c) MRI
d) Ultrasound
Rationale: MRI provides superior contrast resolution for soft
tissues, making it ideal for ligament, tendon, and meniscus
evaluation.
2. The ALARA principle in radiology refers to:
a) Using the latest imaging equipment
b) Minimizing radiation exposure
c) Maximizing image contrast
d) Using contrast agents efficiently
Rationale: ALARA stands for "As Low As Reasonably Achievable,"
emphasizing radiation dose reduction.
3. What is the primary function of a grid in radiography?
a) Increase exposure time
b) Reduce patient motion
c) Reduce scatter radiation and improve image contrast
d) Enhance image magnification
, Rationale: Grids absorb scatter radiation, which improves image
contrast, especially in thicker body parts.
4. In digital radiography, pixel size primarily affects:
a) Exposure time
b) Spatial resolution
c) Contrast resolution
d) Patient dose
Rationale: Smaller pixel sizes result in higher spatial resolution,
allowing finer details to be visualized.
5. Which contrast agent is typically used in CT imaging to evaluate
the urinary tract?
a) Barium
b) Iodine-based contrast
c) Gadolinium
d) Air
Rationale: Iodine-based contrast is water-soluble and excreted by
the kidneys, making it ideal for urinary tract imaging.
6. The term “fluoroscopy” refers to:
a) Real-time X-ray imaging
b) CT scanning
c) MRI scanning
d) Ultrasound imaging
Rationale: Fluoroscopy provides continuous, real-time X-ray
images, often used in interventional procedures.
7. A patient presents with suspected pneumothorax. Which imaging
modality is first-line?
a) MRI
, b) Chest X-ray
c) Ultrasound
d) CT scan
Rationale: Chest X-ray is fast, accessible, and effective in detecting
pneumothorax.
8. When positioning a patient for a lateral lumbar spine radiograph,
the central ray should be:
a) At T12
b) At L3
c) At L5-S1
d) At the sacrum
Rationale: The L3 vertebral body is the standard central ray point
for lateral lumbar imaging.
9. What is the primary purpose of collimation in radiography?
a) Increase exposure time
b) Limit the X-ray beam to the area of interest
c) Improve patient comfort
d) Enhance scatter radiation
Rationale: Collimation reduces patient dose and improves image
quality by limiting unnecessary radiation.
10. A technologist notices the patient is in respiratory distress
during an exam. The first action should be:
a) Continue the exam
b) Stop the exam and call for medical assistance
c) Increase oxygen flow
d) Adjust the imaging equipment
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which imaging modality is most appropriate for evaluating soft
tissue injuries of the knee?
a) X-ray
b) CT
c) MRI
d) Ultrasound
Rationale: MRI provides superior contrast resolution for soft
tissues, making it ideal for ligament, tendon, and meniscus
evaluation.
2. The ALARA principle in radiology refers to:
a) Using the latest imaging equipment
b) Minimizing radiation exposure
c) Maximizing image contrast
d) Using contrast agents efficiently
Rationale: ALARA stands for "As Low As Reasonably Achievable,"
emphasizing radiation dose reduction.
3. What is the primary function of a grid in radiography?
a) Increase exposure time
b) Reduce patient motion
c) Reduce scatter radiation and improve image contrast
d) Enhance image magnification
, Rationale: Grids absorb scatter radiation, which improves image
contrast, especially in thicker body parts.
4. In digital radiography, pixel size primarily affects:
a) Exposure time
b) Spatial resolution
c) Contrast resolution
d) Patient dose
Rationale: Smaller pixel sizes result in higher spatial resolution,
allowing finer details to be visualized.
5. Which contrast agent is typically used in CT imaging to evaluate
the urinary tract?
a) Barium
b) Iodine-based contrast
c) Gadolinium
d) Air
Rationale: Iodine-based contrast is water-soluble and excreted by
the kidneys, making it ideal for urinary tract imaging.
6. The term “fluoroscopy” refers to:
a) Real-time X-ray imaging
b) CT scanning
c) MRI scanning
d) Ultrasound imaging
Rationale: Fluoroscopy provides continuous, real-time X-ray
images, often used in interventional procedures.
7. A patient presents with suspected pneumothorax. Which imaging
modality is first-line?
a) MRI
, b) Chest X-ray
c) Ultrasound
d) CT scan
Rationale: Chest X-ray is fast, accessible, and effective in detecting
pneumothorax.
8. When positioning a patient for a lateral lumbar spine radiograph,
the central ray should be:
a) At T12
b) At L3
c) At L5-S1
d) At the sacrum
Rationale: The L3 vertebral body is the standard central ray point
for lateral lumbar imaging.
9. What is the primary purpose of collimation in radiography?
a) Increase exposure time
b) Limit the X-ray beam to the area of interest
c) Improve patient comfort
d) Enhance scatter radiation
Rationale: Collimation reduces patient dose and improves image
quality by limiting unnecessary radiation.
10. A technologist notices the patient is in respiratory distress
during an exam. The first action should be:
a) Continue the exam
b) Stop the exam and call for medical assistance
c) Increase oxygen flow
d) Adjust the imaging equipment
