Nucs Flashcards
Renal and GI seen on Tc or In labeled WBC?
tech
tc mdp crticial organ
bone
f 18 critical organ
bladder
marked increase of skull sutures on bone scan
renal osteodystrophy
hot renal cortex activity?
hemochromatosis
bone scan at what time will exclude fracture
1 week
metabolic causes of super scan
hyperPTH
renal osteodystrophy
pagets
severe thyrotoxicosis
what two scenarios to use tc 99 HMPAO over in WBC for inection?
kids
hands/feet
what is critical organ in IN WBC?
spleen
bio half life of tc 99m MAA?
4 hours
physical half life of xenon 133
5.3 days
biological half life of xenon 133
30 seconds
xenon 133 energey
80 kev
particle size of MAA?
10-100
gallium half life
3 days
critical organ in gallium?
colon
panda sign is seen in what three things
sarcoid
sjogrens
treated lymphoma
what is not organified? i 123, i 131 or tc
tc
1/2 life i 123
13 hours
energy i 123
159 kev
tc 99m breast feeding
12-24 hours
I 123 breast feeding
2-3 days
ioding uptake doses
5 mci I 131, 10-20 mci I123
normal 4 hour idoine uptake
5-15%
normal 24 hour iodine uptake
10-35%
NRC limit for admission after radioiodine therapy
7 mR/h
typical does for graves
15 mci
typical dose for multinodular goiter
30 mci
what two agents can be used for parenchymal brain imaging
hmpao ecd
what agent cannot be used for parenchymal imaging
dtpa
dtpa use in brain?
shunt study
thallium half life
3 days
thallium decays how
electron capture
cingulate island sign=
dementia with lewy bodies
huntington on brain pet
low caudate and putamen
alzheimers brain pet
low posterior tempororparietal cortex
LEW BODY on brain pet
low lateral occipital with sparing of cingulate gyrus
what agent can be used prior to meckels scan to improve imaging
pentagastrin
h2 blcokers
glucagon
what is the dose of CCK
0.02 microgram/kg over 60 mins
what is dose of mrophine
0.02-0.04mg/kg over 30-60 mins
what two meds can cause prompt uptake with delayed biliary clearance
dilantin
birth control pills