Magnetic Resonance Imaging (MRI)

Question 1

What is magnetic resonance imaging?

Answer 1

o Cross-sectional imaging using magnetic field and radiofrequency signals “read” by a computer

Question 2

Name clinical uses for MRI

Answer 2

• Best modality for visualizing soft tissue (ligaments and tendons)
• Bone tumors
• stress fractures
• osteomylelitis
• avascular necrosis
• Pathologies of intervertebral discs

Question 3

Name 3 common types of MRI scans

Answer 3

• With contrast (blood vessels, scars, tumors, infection)
• Arthrography (soft tissue tears and joint spaces)
• Myelography (spinal stenosis)

Question 4

List the contraindications of MRI

Answer 4

• Pacemakers
• intracranial aneurysm clips
• foreign metal objects
• orthopedic hardware
• Large tattoos (due to high iron content in pigments)
• Cochlear implants
• Kidney disease
• allergy to contrast/iodine

Question 5

List Pros and Cons of MRI

Answer 5

o Pros:
- Excellent resolution of all soft tissue
- No exposure to ionizing radiation

o Cons:
- Very expensive
- Poor for visualizing bone
- Time consuming process
- Troublesome for patients who suffer from claustrophobia unless using open scanner