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18 Cards in this Set
- Front
- Back
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I -131
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gamma: 364 keV
beta: 0.6 meV half life: 8 days dist: nasopharynx, oropharynx, salivary glands, stomach, bowel, bladder, breasts |
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I - 123
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gamma: 159 keV
half life: 13 hrs dist: naso, oro, salivary glands, stomach, bowel, bladder, breasts dose: 200-400 micro-curies |
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free Tc 99m
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gamma: 140 keV
half life: 6 hrs dist: endoderm - thyroid, stomach, salivary glands, choroid plexus |
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Ga - 67
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gamma: 93, 184, 300, 390 (think intervals of 9)
half life: 2.8 days dose: 5-10 mCi dist: iron analogue (transferrin, lactoferrin), liver>spleen, bowel, lacrimal glands Indications: lymphoma, HCC, infection artifact: "bone scan pattern" Seen with multiple transfusions. Transferrin can't take Ga anywhere. Only bone and kidneys will light up |
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Tc 99m - MDP
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gamma: 140 keV
half life: 6 hrs dose: 20 mCi dist: based on osteoblastic activity. renally excreted |
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Tl - 201
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gamma: 167 keV
x-rays (from Hg cascade): 69-83 keV (used for imaging) half life: 3 days dose: 3 mCi dist: heart, liver, spleen, gut, kidney, muscle Requires active transport to get into heart |
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Tracers that have myocardial uptake
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1) Tl - 201
2) Tc - 99m sestamibi 3) F-18 FDG 4) I-123 MIBG |
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Tc 99m sestamibi
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gamma: 140 keV
half life: 6 hrs dose: 10-30 mCi dist: heart, muscle, liver, bowel, kidney Indications: myocardial perfusion. parathyroid imaging |
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I-123 MIBG
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gamma: 159 keV
half life: 13 hrs dose: 8 mCi dist: heart, salivary glands, liver, gut (no bone) Don't need to give Lugol's (unless using I-131 |
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In-111 tagged WBC
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gamma: 172, 247 keV
half life: 3 days dose: 500 microcuries dist: spleen>liver>bone marrow |
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In-111 octreotide
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gamma: 172, 247 keV
half life: 3 days dose: 6 mCi dist: liver, spleen, kidneys, gut, |
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Major spill criteria for:
a) Tc-99m b) I-131 c) Tl-201 d) I-123 e) F-18 |
a) 100 mCi
b) 1 mCi c) 100 mCi d) 10 mCi e) 1 mCi |
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Mo-99
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gamma: 740 keV
half life: 67 hrs Dose calibrator limits (NRC): 0.15 microCi Mo for 1 mCi Tc99m |
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How do you manage a minor spill?
Major spill? |
SWIMS: Stop the spill, warn others, isolate the area, and minimize the exposure, survey the area
Major: call RSO |
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What defines a medical event?
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1) dose to body greater than 50 mSv or organ greater than 500 mSv
2) differs from prescribed dose greater than 20% or excess dose given to wrong patient, wrong route, or wrong radiopharmeceutical |
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When do you have to accept packages?
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1) within 3 hours during the working day
2) within 3 hours in the morning if package came in overnight. |
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When to resume breastfeeding for:
a) Tc-99m b) I-131 c) Ga-67 d) F-18 |
a) 24 hrs
b) STOP c) 1 month d) 24 hrs |
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Transport regulations for:
a) White I b) Yellow II c) Yellow III |
a) 0.5 mrem/hr
b) 50 mrem/hr 1 mrem/hr at 3 ft c) 200 mrem/hr 10 mrem/hr at 3 ft |
