Imaging

Question 1

What 5 imaging techniques are used?

Answer 1

1. radiography
2. CT
3. MRI
4. Ultrasound
5. PET

Question 2

What are the benefits of radiography (x-ray)?

Answer 2

• simple, quick
• low dose

Question 3

What are the uses for radiography?

Answer 3

• mammogram
• bone densitometry
• (+ contrast agent) for blood, urinary, GI tract

Question 4

What is CT?

Answer 4

• multiple 2D xrays to build 3D image

Question 5

What are the benefits and negatives of MRI?

Answer 5

• can differentiate normal and abnormal tissue
• no metal implants

Question 6

What are the benefits of ultrasound?

Answer 6

• can show static or moving images
• non-invasive

Question 7

what are the applications of ultrasound?

Answer 7

• babies
• doppler blood flow

Question 8

how does PET work?

Answer 8

• inject a positron emitting source, tissues will uptake it
• Collision with charged electrons will emit gamma rays, detected by gamma cameras

Question 9

what is the purpose of PET scans?

Answer 9

• shows where a substance is going in the body
• can show blockages or other issues