1. Radiation Quantities and Units
Chapter 3
Sherer

2. Review-Pages 53-56 Somatic effects Long term somatic Genetic effects
Box 3-1

3. Page specifically
Tolerance dose was replaced with Maximum Permissible dose (MPD)-dose limits-effective dose
Safe occupations (clerical) has a risk of per year- same as radiography
EfD – type of radiation and the sensitivity of the tissue being exposed. The Sievert is the unit of measurement

4. Focus on these terms and definitions-page. Begins on pg 58
Exposure (X)
Absorbed dose (D)
Equivalent dose (EqD)
Effective dose (EfD)
Overall risk based on absorbed dose, tissue and type of radiation
See Box 3-3 (see next slide)
Absorbed Dose

5. Box 3-3(follow-up questions see assignment for this class)
Equivalent Dose
EqD=D x Wr Or
Sv=Gy x Wr
Effective dose
EfD=D xWr x Wt

6. Quality Factor, pg 63 Sherer
LET pg 63 Sherer "rate in which energy is deposited in the form of a charged particle or ion pair as it travels through matter“

7. Rem = RAD x QF
LETS of 3% or less have a QF of 1 = same amount of damage of rad per rem
QUALITY FACTOR and weighting factor OF ALPHA IS 20 See box Table 3-2 Sherer
1 RAD = 20 REM FOR ALPHA PARTICLE ABSORPTION

9. WHICH HAS A HIGHER LET NUMBER?
X-rays (HIGH OR LOW?)
Alpha (HIGH OR LOW?)
Beta (HIGH OR LOW?)
Gamma (HIGH OR LOW?)

10. WR associated with Equivalent Dose- table 3-2
WT associated with Effective Dose- table 3-3