pet-ct Flashcards
1
Q
What does it detect?
A
Detects how much certain cells process components such as glucose
2
Q
How does it work?
A
A radionuclide releases a positron which annihilates with an electron to produce 2 0.51 mV gamma rays. The rays travel in opposite directions and when two are detected at the same time, its called coincidence detection.
3
Q
What are some advantages?
A
- Quicker scan time
- Increased diagnostic accuracy
4
Q
What are some disadvantages?
A
- expensive
- Can cause artefacts
- 1 modality at a time
