GI and GU Doses

Question 1

HIDA

Answer 1

Dose: 3-10 mCi
Min. pediatric dose: 1mCi

R/P: Tc99m labeled Disofenin
Tc99m labeled Mebrofenin

Question 2

GI Bleed

Answer 2

10-20 mCi Sulfur Colloid
20-30 mCi Tc99m tagged RBC’s

Question 3

Meckels Diverticulum

Answer 3

5-10 mCi adults Tc99m
200 uCi/kg Tc99m

Question 4

Gastric Emptying

Answer 4

Solid phase: 0.5-1.0 mCi Tc99m Sulfur Colloid

Liquid phase: 100-200 uCi In111 DTPA

Question 5

Esophageal Transit

Answer 5

300 uCi Tc99m S.C.

Question 6

GE Reflux

Answer 6

300 uCi - 2 mCi Tc99m S.C

Question 7

Liver/Spleen

Answer 7

5-10 mCi Tc99m S.C.

OR

1-8 mCi Tc99m Albumin Colloid

Question 8

Hepatic Hemangioma

Answer 8

20-30 mCi Tc99m tagged RBC

Question 9

Renogram

Answer 9

MAG3: 3-8 mCi
Tc99m DTPA: 3-10 mCi
I131, I123 Hippuran (OH): 150-300 uCi

Question 10

Renogram w/LASIX

Answer 10

LASIX: 0.5 mg/kg (1.0 mg/kg peds) with max dose of 20-40 mg (slow infusion over 1-3 min)

Question 11

Renogram w/ACE Inhibitor

Answer 11

Captopril (5-10 mCi)
- oral dose: 25-50 mg given 1 hr. prior to imaging.

I.V. Enalaprilat (0.04 mg/kg) over 5 min. (max 2.5 mg/2 mL)

Question 12

Thyroid

Answer 12

Tc04-: 2-10 mCi (wait 20 min.)

OR

I123: 200-400 uCi (wait 4 hrs.)

Question 13

Parathyroid

Answer 13

• Tc99m Pertechnetate: 5-23 mCi
• Tl201 Chloride: 2-3 mCi
• Tc99m MIBI: 20-25 mCi
• I123 capsule: 200-300 uCi

Question 14

In111 WBC

Answer 14

300-500 uCi

Question 15

Tc99m HMPAO WBC

Answer 15

10-20 mCi

Question 16

MIBG

Answer 16

I131 MIBG: .5-1 mCi
I123 MIBG: 3-10 mCi

Question 17

In111 Octreotide

Answer 17

3-6 mCi In111 Octreo
0.14 mCi/kg for peds.