Nucs Flashcards
half life of F-18
110 minutes
NPO before PET for how long?
4 hours
How much Tc 99m MAA administered?
3-5 mCi
How big are the particle sizes of Tc - 99m MAA
10-30 um
Physical half life of Xenon-133?
5.3 days
How much does Xenon-133 emit?
81 keV gamma photons
How much Tc 99m DTPA given?
30 mCi
How long does Tc 99m DTPA particles remain in place?
20-60 min
High PE probability
2 large mismatch segmental defects
Moderate PE probability
1 large mismatch segmental defect
or
triple match in lower lungs
Low PE probability
single large matched defect or absent perfusion of entire lung or >3 match defects
Very low PE probability
nonsegmental lesions, stripe sign, triple match defect in mid-upper lungs
MAA half life
4 hours
Gamma photopeaks of gallium
90, 190, 290, 390 keV
when do you image gallium
48-72 hours later
CCK indication and dose
if NPO >24h
dose: 0.02 ug/kg, slow infusion
wait 2 hours before starting test
morphine indication and dose
if GB not seen within one hour
dose: 0.04 mg/g, up to max 4 mg
continue imaging 30 more min
Treat multinodular goiter, what and how much
30 mCi of I 131
Treat multinodular goiter, what and how much
25 mCi of I 131
I 131 emits what
beta particles and 364 keV gamma photons
half life of I 131?
8 days
I 123 emits what energy, what half life
159 keV, 13 hours
Treat Graves disease, dose
I 131, 5-15 mCi
physical half-life of Tl-201 thallous chloride
73 Hours
physical half life of I 123
13 hours
physical half life of Ind 111
67.2 hours
physical half life of N3 Ammonia
10 minutes
physical half life of Tch99m, what energy
6h, 140 keV
Minor spill limit for TI 201, I 131, Tc 99M, I 123, In 111, Ga 67
in MCi
TI201 and Tc99m 100,
I131: 1
I123,In111,Ga67 are 10
A licensee may authorize the release from its control of any individual who has been administered unsealed by-product material or implants containing by-product material if the total effective dose equivalent to any other individual from exposure to the released individual is not likely to exceed ?
0.5 rem (5 mSv).
time intervals are optimum for somatostatin receptor scintigraphy with In-111 pentetreotide?
4 and 24 or 24 and 48
High radiation area
place where radiation levels could result in an individual receiving greater than 0.1 rem (1 mSv) in 1 hour at 30 cm from the radiation source