54. NUCLEAR IMAGING: MULTI MODALITY IMAGING

Question 1

1. What kind of information do both SPECT and PET provide?

Answer 1

• Functional information

Question 2

2. What is necessary to know when we are using both PET and SPECT technology?

Answer 2

• we need to know the exact location of the
  Radiopharmaceutical accumulation
• this allows us to relate the activity to a specific organ or
  site

Question 3

3. What kind of image is often acquired with CT or MRI?

Answer 3

• a structural image
• a reconstructed activity map is then superimposed
  over the structural image

Question 4

4. What happens after a structural CT or MRI image is taken?

Answer 4

• it should be followed by a separate SPECT or PET scan

Question 5

5. Why is accuracy regarding patient positioning crucial?

Answer 5

IF THE PATIENT POSITIONING WAS NOT CAREFULLY REPRODUCED BETWEEN STUDIES:
- the PET / SPECT images
- and the CT / MRI images
- would not match
- this leads to a mis-registration

Question 6

6. How can we correct patient positioning errors?

Answer 6

• PET / SPECT camera images
• and CT / MRI images
• can be fused manually

OR:
- they can be fused by computer software

OR:
- by both

Question 7

7. What are the 4 kinds of Specialised Dual Modality scanners exist?

Answer 7

1. SPECT/CT Scanners
2. SPECT/MRI Scanners
3. PET/CT Scanners
4. PET/MRI Scanners

Question 8

8. Why are the specialised Dual Modality scanners often not used?

Answer 8

• they are very expensive

Question 9

9. How do we make use of Multi Modality Imaging?

Answer 9

WE FIRST OBTAIN A PET SCAN:
- the table moves into the gantry

THEN WE OBTAIN CT INFORMATION