1625 yr - ANS Ra-226 half life
3.8 d - ANS Rn-222 half life
5.3y - ANS Co-60 half life
30y - ANS Cs-137 half life
74 d - ANS Ir-192 hald life
27 d - ANS Au-198 half life
60d - ANS I-125 half lfie
17d - ANS Pd-103 h...
Co-60, Teletherapy, GammaKnife, HDR, Prostate Seed Implant - ANS List in order amount
of activity from highest to lowest:
HDR, Co-60, Teletherapy, GammaKnife, Prostate Seed Implant
RX isodose Volume/PTV Volume - ANS Conformity Index
<10% - ANS Heart V25
D2 - ANS Maximum total dose in Gy to any point 2cm or greater away from the PTV in any
direction
V12<5-10cc - ANS Brain volume SRS 1 fx
2mm; 1 degree - ANS TG-142 suggests monthly QA tolerances for lateral, longitudinal, and
rotational couch positions for IMRT to be
2mm, 1% on a side - ANS TG-142 suggests monthly QA tolerances for mechanical/light
field coincidence for IMRT to be
2% - ANS TG-142 suggests monthly QA tolerances for electron output constancy for IMRT
to be
R50 - ANS the ratio of the volume of 50% of the prescription dose isodose to the volume of
the PTV
2mm - ANS TG-40 suggests daily QA tolerances for laser localization for simulators to be
2mm - ANS TG-40 suggests annual QA for medical accelerator tolerances for gantry
rotation isocenter to be
<32% - ANS Kidney V20
E, FS, d, SSD - ANS PDD is dependent on
E, FS, d - ANS TMR is dependent on
, 3.7 x 10^10 Bq - ANS 1 Ci =? Bq
10^6 - ANS mega (M)
alpha particle, 1MV, 250kVp, Co-60 - ANS Rank LET from highest to lowest: 1MV, alpha
particle, 250kVp, Co-60
1mSv - ANS 100mrad = ? dose equivalent
<12 Gy - ANS Optic Nerve/Chiasm SRS 1 fx Dmax
target, Primary collimator, flattening filter, dose chambers, secondary collimator - ANS
What is the correct order of components in treatment head to generate x-rays?
6Mv - ANS Which linac energy requires the highest beam current
Leukemia - ANS Which is considered a stochastic effect?
Cataracts, Erythema, Sterility, Leukemia
Slightly greater - ANS The lateral penumbra of a proton field is ______ as compared to a
photon field.
55Gy - ANS What is the ideal dose limit to 0.03cc of the brainstem?
Depth, FS, E - ANS TMR are dependent on what?
Dscatter/Dair under SAD conditions - ANS SAR is defined by
the pelvic sidewall/obturator nodes - ANS The location of point B in a T&O procedure is
(273.2 + T / 295)(760/P) - ANS Temp/Press correction formula
slightly greater - ANS The surface dose for a proton field is _______ as compared to a
photon field.
Linac QA - ANS TG142 is a document that gives recommendations on what?
Prostate - ANS Cs-131 is mostly common used in brachytherapy for which kind of
treatment?
1 - ANS The QF for electron is:
a portion of the target is not covered by the RX dose - ANS A Conformity Index of <1.0
means what?
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