RP Doses Flashcards
Tc99m DTPA
CNS imaging
15-30mCi
Tc99m TcO4
CNS imaging
15-30mCi
(Tc99m TcO4- least desirable
Because it accumulates in the choroid plexus, so you would have to administer potassium perchlorate before)
F-18 FDG PET
CNS imaging
15-30mCi
Tc99m exametazine
(HMPAO- Ceretec)
Brain perfusion imaging
10-20mCi
Eluate should be less than 2 hrs old
Tc99m Bicisate
(ECD- Neurolite)
Brain perfusion imaging
15-20mCi
Faster clearance- 40min
Pharmaceutical
Acetazolamide (Diamox)
1g
in 10mL over 2min
In-111 DTPA
Cisternography
0.5-1mCi
I-123 Ioflupane
DaTSCAN
3-5mCi
Pharmaceuticals
potassium perchlorate
SSKI
(for DaTSCAN)
potassium perchlorate: 400mg
SSKI: 100mg
Tc99m TcO4
Thyroid imaging
2-10mCi
I-123 NaI
Thyroid imaging
0.2-0.6mCi
I-131 NaI
Thyroid imaging
0.05-0.2mCi
Tc99m Sestamibi
Parathyroid imaging
5-25mCi
What 2 dual tracers are used to localize normal thyroid tissue?
Tc99m TcO4
I-123 NaI
What 2 dual tracers are used to localize thyroid & ab normal parathyroid tissue?
Tc99m Sestamibi
Tl-201 thallous chloride
I-123 MIBG
I-131 MIBG
Adrenal imaging
I-123 MIBG- 10mCi
I-131 MIBG- 0.5mCi
Tc99m sulfur colloid
Liver/spleen imaging
5-10mCi
85% localizes in liver- 10% in spleen
Tc99m mebrofenin
HIDA
1-5mCi
Pharmaceutical:
CCK
(Sincalide- Kinevac)
0.02ug/kg
Pharmaceutical:
Morphine
0.04 mg/kg
(in 10mL over 2min)
if no GB shows
Pharmaceutical:
Phenobarbital
5mg/kg/day
(x 5days)
Biliary atresia
Tc99m RBC’s
Liver Hemangioma
20-50mCi
Tc99m TcO4
Meckel’s Diverticulum
10-15mCi
Pharmaceutical:
Pentagastrin
Cimetedine
Pentagastrin: 6ug/kg
(stimulates gastric secretion)
Cimetidine:
adult: 300mg
child: 20mg
(retains tracer in gastric mucosa)
Tc99m sulfur colloid
Tc99m RBC’s
GI Bleed
Tc99m sulfur colloid: 20-50mCi (active bleeding)
Tc99m RBC’s 20-50mCi (intermittent bleeding)
Tc99m sulfur colloid
Gastroesophageal reflux
300uCi- 2mCi
mixed in 150mL OJ
Tc99m sulfur colloid
Gastric emptying
0.5 - 1mCi (PO)
Tc99m TcO4
salivary gland imaging
10mCi
Tc99m sulfur colloid
Tc99m MAA
Leveen shunt patency
1-2uCi (for both)
C-14 Urea Breath test
H-Pylori
1mCi
Tc99m Succimer (DMSA)
2-6mCi
binds to proximal renal tubules
Pharmaceutical:
Furosemide (Lasix)
20-40mg