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
Radiation area
radiation levels could result in an individual receiving a dose equivalent in excess of 0.005 rem (0.05 mSv) in 1 hour at 30 cm from the radiation source.
Very high radiation area
where radiation levels could result in an individual receiving an absorbed dose in excess of 500 rad (5 Gy) in 1 hour at 1 m.
Sterility in men and women. How much radiation.
600 to 800 cGy
Acute radiation syndrome
50 rad
fetus takes up iodine at how many weeks?
1st trimester, 12 weeks
I-123, breast feeding resumed how long?
2-3 days
Tc 99m, breast feeding resume how long?
12-24 hours
I-131, breast feeding resume how long?
you can’t. stop it. dont breast feed yo.
Gallium Dose
5mCi for inflammation, 10 mCi for tumors
Gallium Dose
5mCi for inflammation, 10 mCi for tumors
dose for tagged rbc bleeding
20 mCi Tch99
dose for tagged rbc bleeding
20 mCi Tch99
dose for sulfur colloid scan
5 mCi
biologic half life of sulfur colloid
3 min
biologic half life of sulfur colloid
3 min
sulfur colloid particle size
0.1-1um
sulfur colloid particle size
0.1-1um
dose for meckel
10 mCi Tch99 pertechnetate
dose for meckel
10 mCi Tch99 pertechnetate
dose for HIDA
5 mCi
dose for HIDA
5 mCi
chronic cholecystitis medication
.02 ug/kg CCK over 1 hour
chronic cholecystitis medication
.02 ug/kg CCK over 1 hour
tch99m HMPAO and tc99m ECD dose
20 mCi, static for 20 min
tch99m HMPAO and tc99m ECD dose
20 mCi, static for 20 min
dose renal scan, tch99m dtpa or tc99m mag3
10 mCi
dose renal scan, tch99m dtpa or tc99m mag3
10 mCi
prep for renal a stenosis?
NPO 6h before, stop ACE-I several days before
small sized lung nodule that can be detected by PET?
8 mm
small sized lung nodule that can be detected by PET?
8 mm
Which two agents are both made by generators
Tch99 (Mo) Rubidium 82 (Strontium 82)
Which two agents are both made by generators
Tch99 (Mo) Rubidium 82 (Strontium 82)
Rubidium half ilfe
1 minute
Rubidium half ilfe
1 minute
max target heart rate
85% or 220 bpm-age
max target heart rate
85% or 220 bpm-age
adenosine half life
30 seconds
ragadenoson half life
3 min
ragadenoson half life
3 min
sestamibi dose, stress sand rest
10 mci for rest, 20 for stress
sestamibi dose and procedure, stress sand rest
10 mci for rest, 20 for stress; wait 30 min after injection
sestamibi dose and procedure, stress sand rest
10 mci for rest, 30 mci for stress; wait 30 min after injection
thallium procedure
3 mci at stress, image immediately after exercise; and then 3 h ater redistirbution occurs
thallium half life
73 hours
thallium half life
73 hours
yttrium half life, emission, max tissue penetration, particle size, radiation dose
3 days, 175 186 ke, 10 mm; 20-40 um, 100-1000 Gy
yttrium half life, emission, max tissue penetration, particle size, radiation dose
3 days, 175 186 ke, 10 mm; 20-40 um, 100-1000 Gy
stronium, samarium, yttrium half lives
50 days (2 wks in bones), 45 hours, 65 hours