Doses & Time To Image

Question 1

Cardiac: MPI

Answer 1

Tl201 3-5 mCi

Tc99 8 - 30 mCi

Question 2

Cardiac: MUGA

Answer 2

Tc99 tagged RBC 20 - 30 mCi

Question 3

Brain: rCBF

Answer 3

Tc99 HMPAO or ECD 20 - 30 mCi

Question 4

Brain: Cysternography

Answer 4

In111 DTPA 0.5 - 1.5 mCi

Question 5

Brain: Shunt Patency

Answer 5

Tc99 DTPA 0.5 - 2.0 mCi

Question 6

Lung: Ventilation

Answer 6

Xe133 10 - 20 mCi

Tc99 DTPA 40 - 50 mCi

Question 7

Lung: Perfusion

Answer 7

Tc99 MAA 4 - 6 mCi

Question 8

PET: NaF

Answer 8

5 - 10 mCi

0.5 - 5 mCi LEDs

Question 9

PET: Thyroid

Answer 9

I123 200 - 400 uCi
I131 50 - 100 uCi
FDG 4 - 20 mCi

Question 10

PET: CNS

Answer 10

5 - 10 mCi

Question 11

PET: MPI

Answer 11

Rb82 30 - 50 mCi

Question 12

Bone TTI

Answer 12

2 - 4 hrs

Question 13

Cardiac: MPI TTI

Answer 13

Tl201 1 day: Stress 3 - 5 hrs
Tl201/ Tc99 1 day: none
15 min treadmill
45 min pharmacological 
Tc99 1 day: 1 - 2 hrs

Question 14

Brain: rCBF TTI

Answer 14

60 - 90 minutes

Question 15

Brain: Cysternography TTI

Answer 15

Injection site immediately

2, 4, 6, and 24 hrs

Question 16

Brain: Shunt Patency TTI

Answer 16

Abdomen immediately

Every 15 minutes for 1 hour

Question 17

Lung: Ventilation TTI

Answer 17

Xe133 while inhaling

DTPA within a few minutes

Question 18

Lung: perfusion TTI

Answer 18

Immediately

Question 19

PET: NaF TTI

Answer 19

45 - 90 minutes

Question 20

PET: CNS TTI

Answer 20

30 minutes

Question 21

PET: MPI TTI

Answer 21

15 - 20 minutes

Question 22

Bone

Answer 22

3 phase, Limited, Whole Body: 20 - 30 mCi Tc99 MDP or HDP