CAMRT Exam Questions with Rationale 2024

CAMRT Exam Questions with Rationale 2024 half-life and energy of Tc-99m T= 6hrs 140keV half-life and energy of Mo-99 T=66hrs 740keV and 778keV Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:07 / 0:15 Full screen half-life and energy of I-131 T=8 days 364keV half-life and energy of I-123 T=13hrs 159keV half-life and energy of In-111 T=67hrs 171keV and 245keV Half life and energy of Xenon-133? 5 days. 81 keV. half-life and energy of Tl-201 T=3 days 69-82keV (Hg x-rays), 135keV, 167keV half-life and energy of Ga-67 T=3.26days 92keV, 185keV, 300keV, 394keV half-life and energy of Y90 64hrs Beta half-life and energy of 18-F T=110mins 511keV half-life and energy of C-11 T=20mins 511 half-life and energy of N-13 T=10min half-life and energy of O-15 T=2 min half-life and energy of Ga-68 68mins half-life and energy of Rb-82 76sec half-life and energy of Cs-137 30years 662keV half-life and energy of Co-57 272days 122keV and 136keV 1mCi = ? Bq 37MBq 100 REM = __________ Sv 1 Sv 100 Rad = _____ Gray 1 Gy Exposure Rate Equation Exposure Rate = Activity x Exposure Rate Constant x 1/d^2 units are cm^2mR/mCihr inverse square law i1d1^2 = i2d2^2 Energy or spatial resolution equation high value-low value at half peak/energy or channel standard deviation = sqrtN standard deviation of net count rate sum of squares of the sample counts and bkd counts Frequency of DC constancy daily Frequency of DC linearity quarterly Frequency of DC accuracy Annualy Frequency of well counter constancy daily Frequency of well counter energy resolution quarterly frequency of well counter chi-square (precision) quarterly Frequency of well counter efficiency annually Frequency of Gamma Camera peaking daily Frequency of Gamma Camera uniformity daily Frequency of Gamma Camera reolsution weekly Frequency of Gamma Camera linearity weekly Frequency of Gamma Camera collimator damage check annually Frequency of Gamma Camera SPECT COR weekly or monthly Frequency of Gamma Camera Jaszczak annually Frequency of PET blank scan daily Frequency of PET tomographic uniformity weekly Frequency of PET normalization quarterly/annually What is an unrestricted area? general public may enter Max exposure limit -- less than 0.02mSv/hr e.g waiting rooms What areas require the Rayonnement-Danger-Radiation sign? 1) any area in which there is reasonable probability that a person in the area will be exposed to an effective dose 25uSv/hr; and/or 2) a room where there is any nuclear substance in a quantity of more than 100 times the EQ White I does not exceed 5uSv/hr at any location on the external surface of the package Yellow II does not exceed 500uSv/hr at any location on the external surface of the package TI does not exceed 1 Yellow III does not exceed 2mSv/hr at any location on the external surface of the package TI does not exceed 10 Transport Index (TI) max radiation level in uSv/hr at one meter from the external surface of the package DIVIDED BY 10 When to use an ionization survey meter converts current to radiation units usually as a dose rate (mR/hr) requires a relatively high exposure rate to give a good reading Use when monitoring patient or package exposure levels When to use a GM counter (count rate meter) Finding contamination Whole body dose limit for NEW 50mSv/year up to 100mSv over 5 years Skin or hand dose limit for NEWs 500mSv/y lens of eye dose limit for NEWs 150 mSv General public dose limit 1mSv Pregnancy dose limit 4mSv for balance of pregnancy calculate percent of original intensity 100%/2^n where n is the number of HVLs HVL of Tc99m in Pb 0.25mm where to store 131I fume hood in lead where to store Y90 or Sr89 pure beta emitters initial shielding should be plastic, lead on the outside of the plastic to shield the brems Where to store Ra223 lead pig lined with plastic liner