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
what size are particles in sulfur colloid scan
0.1-1 micrometers
two causes of renal activity on sulfur colloid
chf
renal transplant rejection
tc DTPA in kidneys
filtered CFR
tc MAG 3
secreted ERPF
what is the 20/3 ratio
compare counts at 20 and 3 minutes (normal <0.8)
sick kidney with dtpa and ace?
decreased uptake and flow
sick kidney with mag3 and ace?
marked tracer retention
rejection on renal scan?
poor perfusion, delayed excretion
atn on renal scan?
preserved perufsion with delayed excretion
cyclosporine tocitiy on renal scan
perfusion normal
excretion delayed
urinoma onset?
2 weeks post op
lymphocele onset
4-8 weeks post op
tc dmsa critical organ
kidney
two agents to llook at renal cortex?
tc dmsa
tc gh
tracer used in testicular imaging
na99mtcO4
findings of acute early torsion
focal absence of flow
delayed torsion findings
halo of increased activity with central photopenia
indium half life
67 hours
indium decay?
electron capture
indium photopeaks
173
247
prostascint critcial organ
liver
indium wbc critical organ
spleen
indium octreotide critcial organ
spleen
agent used for lympho?
10-50 nm tc labeled SC
lymph particle size
less than 0.2 microns (<200nm)
VQ particle size
10-100 microns
liver spleen particle size
unfiltered
lung heart ratio agent
thallum
lbbb artifcat?
false positive spetal reversible perfusion defect
yttrium 90 emitter?
beta
lung shunt fraction wanted
under 10%
optional yttrium particle size
20-40 micrometer
yttrium dose
100-1000gy
yttrium half life
2.67 days
liver as critical organ 3
prosta scint
i 131 mibg
sulf colloid
spleen as critical organ 3
octreotide
damaged RBCS
in WBC
gallbladder wall as critical organ
hida
renal cortex as critical organ
thallium
dmsa
proximal colon as critical organ 2
sulf olloid oral
sestamibi
bladder as critical organ 3
mag 3
i 123 mibg
mdp
distal colon as crtical organ 1
gallium
tc 99m physical half life
6 hours
idoine 123 phy half life
13 hours
xenon 133 phys half life
125 hours (biologic 30 s)
thallium half life
73 hours
indium 111 half life
67 hours
gallium 27 half life
78 hours
idoine 131 half life
8days
fluorine 18 half life
110 mins
stronitum 89 half life
50.5 days (14 in bone)
samarium 153 half life
46 hours
yttrium 90 half life
64 hours
rubidum 82 half life
75 seconds
nitrogen 13 half life
10 mins
tc 99m energy
140
i 123 energy
159
xenon energy
81
thallium energy
135
167
indium energy
173
247
gallium energy
100
200
300
400
i 131 energy
365
fluorine 18 nergy
511