1. Radiation Quantities and Units
Chapter 3
Sherer
Chapter 33 Bushong

2. Somatic effects
Long term somatic
Genetic effects
Box 3-1

3. Quality Factor, pg 56 Sherer
"rate in which energy is deposited in the form of a charged particle or ion pair as it travels through matter"
LET pg 57 Sherer
Radiographic isotopes pg 46 Bushong
ionization pg. 5 Bushong
Natural sources of radiation, pg 5 Bushong

4. QUALITY FACTOR (QF)
measure of biologic impact or damage of a particular type of radiation
Rem = RAD x QF
LETS of 3% or less have a QF of 1 = same amount of damage of rad per rem
QUALITY FACTOR OF ALPHA IS 20 See box Table 3-1 Sherer
1 RAD = 20 REM FOR ALPHA PARTICLE ABSORPTION

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

7. Radiation Induced Responses
NON-STOCHASTIC AKA (DETERMINISTIC)
STOCHASTIC AKA PROBABILISTIC

8. What do they mean? Exposure (X) Absorbed dose (D)
Equivalent dose (EqD)
Effective dose (EfD)
What strikes the body
Deposit of energy in body
Calculated based on absorbed dose and associated radiation weighting factor (type/energy of a specific radiation)
More tissues radiosensitive than others (tissue weighting factor see Table 3-3

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

10. Radiobiology and Cellular Biology (Bushong Chapter 33)

12. When an atom is ionized Chemical binding properties change
in large molecules: breakage or relocation of molecules…become abnormal
Abnormal means
Function improperly
cease to function -impairment or death of cell

13. Damage is Reversible Ionized atoms become neutral…How?
Molecules are mended by repair enzymes
Immediate response to radiation
Latent response
Pg 484 (Bushong) see Box 33-1

14. RADIATION INTERACTS AT ATOMIC LEVEL
Atoms combine to form molecules
The body is made of macromolecules
What is the definition of macromolecules?

15. With this kind of potential damage….
The government tends to get involved
CHAPTER 7 SHERER

16. YOU ARE RESPONSIBLE FOR DIFFERENTIATING BETWEEN
ICRP
NCRP
UNSCEAR
NAS/NRC-BEIR
NRC
EPA
FDA
OSHA

17. DEFINE
RSC
RSO
NCRP REPORT NO 116