rise app questions Flashcards
Very high radiation area _ /hr at _ m
5 Gy/hr at 1 meter
Frequency of QC: Dose Calibrator Consstancy
Daily
I-131 patient can be release if administered dose is < _ or dose rate is < _ /hr at 1 m
33mCi, 7mrem (70uSv/hr)
Total fetal dose per pregnancy
5 ,Sv
Area for radioactive package wipe test
300 cm2
CNS lethal dose and time
> 20-50 Gy, 1-2 days
Medical event if dose differs from prescribed dose _ mSV effective, _ dose equivalent for an organ, or _ %
50mSv, 500mSv, 20%
Permanent sterility dose, men
6 Gy
Critical organ: MAA
Lungs
Critical Organ: Pertechnetate
Stomach
Critical organ: Xe-133
Airways/trachea
Critical organ: HIDA
GB wall
Critical Organ: Sestamibi
Proximal colon
Critical organ: Sulfur colloid oral
Proximal colon
Critical organ: Octreotide
Spleen
Critical organ: In-111 WBC
Spleen
Critical organ: Tc SC IV
Liver
Critical organ: Damaged RBCs
Spleen
Critical organ: Gallium 67
Distal colon
Critical organ: DMSA
Renal cortex
Critical organ: Thallium
Renal Cortex
Critical organ: Mag 3
Bladder
Critical organ: I-123 MIBG
Bladder
Critical organ: MDP
Bladder
Critical organ: Prostascint (indium)
Liver
Critical organ: I-131 MIBG
Liver
Notify NRC in 24 hours if single event dose exceeds _ total effective, _ eye dose equivalent, or _ swallow dose equiv
50 msv, 150 msv, 500 smv (same as occupational)
How long until individual and NRC notified for medical event
<24 hours patient
<15 days NRC
QC frequency: Gamma camera Energy window setting
each patient
Acute dose to cause cataract
2 Gy
QC frequency: Survey meter battery
before each use
Req’s to store a byproduct for decay
T1/2 <120 days
No surface activity
Labels removed
QC frequency: radiation survey for storage area
Weekly
T 1/2: Moly 99
66 hours
Photopeaks Moly 99
740 and 778 kev
Occupation anual dose limit
50 msv effective, 150 lense, 500 other organ
QC frequency: Dose calibrator accuaracy
Annually
Transient skin erythema dose?
> 2 Gy
QC frequency: Gamma camera energy resolution
Annually
Unnresitrcted area must have dose rates of < _ over _ consecutive days
1 mSv over 7 days
Temporary epilation (hair loss) dose
3-5 Gy
Sealed sources dose must not exceed
30 mCi
QC frequency: Sealed source leaks (wipe test)
6 months
Packages must be measured at _ m for _
1 meter for TI
Acceptable Radiochemical purity for pertechnetate
95% (% tc04 vs free Tc)
Major spill dose I-131
1mCi
Temporary sterility dose men
0.5 Gy
QC frequency: CT dose check
Annually or after replacement/repair
QC frequency: Gamma camera linearity
Weekly
Written directive require for I-131 dose >_
30 mCi
Indium 111 analogue
IRon
Thallium 201 analogue
K
Copies of written directives
3 years
QC frequency: Gamma camera spatial resolution
Weekly
Dose major spill fopr Ga-67, In 111 and I123
10 mCi
Gallium analogue
Iron
Radiochemical purity Tc99 Sc
92%
Least sensitive cell cycle phase
S phase
Dose in 1st two weeks of gestation may lead to spontaneous abortion
100 mGy
Immediate NRC notification require with single dose greater than _ effective _ eye equiv and _ shallow dose equive
5x annual doses (250, 750 and 2500 mSv)
LD50 for young adult
3-4 Gy
CT A/P dose
25-30 mGy
Aluminum break through limit for Tc99 generator
<10ug/mL
Max Moly-99 per Tc99m mCi
0.15 uCi/ mL Tc99m
QC frequency: Leak test sealed sources
Q 6 months
QC frequency: Well counter constancy
Daily
QC frequency: Well counter Energy resolution FWHM
Quarterly
How long must keep radiation protection progams related records
5 years (all other records 3 years)
QC frequency: Gamma camera sensitivity
Annually
WB dose _Gy for hematopoeitc syndrome in _ weeks
2-5 Gy, 2-3 weeks
Chemical purity of Mo99/Tc99
Paper Colorimetric test (al)
How often radiation survey in radionclide use area
Weekly
Yellow 2 label surface rate _ and 1m rate _
0.5 mSv/ hr and 0.001 mSv/hr
Annual exposure limit for eye
150 mSv
Radiation survey frequency for area perpping a material requiring a written directive
Daily
QC frequency: Well counter efficiency
Annually
Longer collimator septa _ resolution and _ sensitivity
increases, decreases
White label 1 surface dose
0.005 mSv (5uSv)/ hr
Radionuclide purity test
Dose calibrator (moly/Tc)
What is minimum dose for deterministic effects
> 2 Gy
Annual public exposure lm,it per NRC
1mSv
RBE Relative biologic effectiveness =
Dose of 250 kV xrays/dose in Gy of test dose
At what LET does RBE maximize
100 keV/micrometer
OER means?
oxygen enhancement ratio
At what (high vs low) LET does OER matter most
lower LET
