1. Stat Ch 8 & 9 RHB – Rad Prot Syllabus
Radiation Protection
Stat Ch 8 & 9
RHB – Rad Prot Syllabus

3. What is the difference between X-ray & Gamma?

5. RHB – Rad Prot – CH. IX p 51 ALARA (no minimum threshold)
STOCHASTIC EFFECTS –
NON TRESHOLD (CA + GENETIC)
NON STHOCAHSTIC (DETERMINISTIC)
SEVERITY OF EFFECTS VARIES WITH RADIATION DOSE (THRESHOLD)
(CATARACTS, SKIN, BONE MARROW,
STERILITY

8. PERSONNEL PROTECTION SCATTER FROM THE PATIENT
TABLE TOP, COLLIMATOR, TUBE HOUSING, BUCKY
STRAY RADIATION – LEAKAGE OR SCATTER RADIATION

9. PERSONNEL PROTECTION
STANDING BEHIND A PROTECTIVE PRIMARY (1/16TH pb) BARRIER:
PRIMARY RADIATION EXPOSURE – 99.87% REDUCED
PORTABLE BARRIER = 99 % REDUCTION

11. PERSONNEL PROTECTION PROTECTIVE APRONS – 0.25 PB = 97% ↓ TO SCATTER
THYROID SHEILDS (0.25 & 0.5)
GLOVES (0.25 & 0.5)

12. PERSONNEL PROTECTION MONITORING
FILM BADGE
TLD
POSL
POCKET DOSIMETER
RING BADGE

13. PERSONNEL PROTECTION MONITORING
DOSE LIMITS
WHOLE BODY
EYES
EXTREMITIES (BELOW ELBOW/KNEES)

14. Occupational Dose ANNUAL LIMITS
WHOLE BODY = 5 REMS / 5000mRem
LENS OF THE EYE = 15 REMS
EXTREMITIES = 50 REMS

20. TLD

21. Ionization chamber

24. Report at least every quarter Preserved for a minimum of 3 years

27. RHB NOTIFICATION (EXP IN 24 HOURS)
IMMEDIATE – WITHIN 24 HOURS
TOTAL DOSE OF 25 rems
Eye dose – 75 rem
Extremity – 250 RADS
OVEREXPOSURE – WITHIN 30 DAYS
TOTAL DOSE OF 5 rems
Eye dose – 15 rem
Extremity REMS

28. LICENSE RENEWAL WITHIN 30 DAYS OF EXPRIATION
NOTIFICATION OF CHANGE OF ADDRESS

29. PUBLIC 2 mrem per week* (STAT)
HIGH RADIAITON AREA –
100 mRem ( 0.1 rem / (1 msV)
@ 30 cm from the source of radiaton
RADIAITON AREA –
RHB: 5 mRem ( rem / (.05 msV)
@ 30 cm from the source of radiation
PUBLIC 2 mrem per week* (STAT)

30. RHB “RULES” RHB RP PG61 LICENTIATES OF THE HEALING ARTS
(MD, DO, DC, DPM)
MUST HAVE A
RADIOLOGY SUPERVISOR & OPERATORS PERMIT & CERTIFICATE
TO OPERATE OR SUPERVISE THE USE OF X-RAYS ON HUMANS
SUPEVISORS MUST POST THEIR LICENSES

31. RHB “RULES” RHB RP PG62 ALL XRAYS MUST BE ORDERED BY A PHYSICIAN
VERBAL OR WRITTEN PRESCRIPTION
See Section C – “Technologist Restrictions”

32. CARDINAL RULES
TIME
DISTANCE
SHEILDING

33. SHEILDING PG 72 RHB HVL – expressed 2 ways
HOW MUCH IT REDUCES THE ORGINAL BEAM INTENSITY
HOW MUCH IS REQUIRED FOR BARRIER THICKNESS (amount needed to attenuated the beam

35. Room Sheilding Ch. 9 Workload Factor (W) -ma/sec/week
– how much time during the week is the beam on
Occupancy Factor (T) - # of people in room - beyond the barrier
Use Factor (U) - % of time beam will strike a barrier (table pg 242) Primary vs Secondary
Leakage Radiation

37. Which type of radiation is predominant above 80 kvp?

41. 10 day rule
No threshold for exposure
Leukemia , congential abnormailies cander induction, resportion or death of the embryo and genetic effects
Therapetuic Abortion “not justified”
25 rads or less – no injury seen
ABSORBED DOSES – 50 RADS – could result in a spontaneous abortion

42. DOSE TO FETUS VS ESE

43. Pregnancy & Embryo
Mother –
occupational worker (5 rem)
Baby – (500 mRem)
.5 rem/ year rem/month
5 mSv mSv / month

45. Declared Pregnant Worker
Must declare pregnancy – 2 badges provided
1 worn at collar (Mother’s exposure)
1 worn inside apron at waist level
Under 5 rad – negligible risk
Risk increases above 15 rad
Recommend abortion (spontaneous) 25 rad
(“Baby exposure” approx 1/1000 of ESE)