Radiation protection

Question 1

May store energy absorbed during x-ray exposure in”electron traps”

Answer 1

Solid-state materials (crystals)

Question 2

energetic electrons released by the application of head, and emit visible light

Answer 2

Thermoluminescent dosimeters (TLDs)

Question 3

TLD used in diagnostic radiology because it simulates the absorption of x-rays by soft tissues

Answer 3

Lithium flouride (Lif)

Question 4

uses Laser light to release stored energy, NOT head as used with TLDs

Answer 4

Optically stimulated luminescence (OSL)

Question 5

Personnel dosimetry

Answer 5

OSL (optically stimulated lumenescence)

Question 6

used to measure patient doses

Answer 6

TLDs (thermoluminescent dosimeters

Question 7

Effective dose limit for Radiation workes

Answer 7

50mSv/year

Question 8

Eye lens dose limit

Answer 8

150mSv/year

Question 9

dose limit to the skin of a radiation worker

Answer 9

500 mSv/year

Question 10

X-ray facilities must be designed to ensure that exposure to members of teh public does not exceed _mSV/year

Answer 10

1 mSv/year

Question 11

Monthly limit mSv to pregnancy

Answer 11

0.5 mSv

Question 12

Lead aprons used in diagnostic radiology should have __ or __ mm equivalents of lead

Answer 12

0.25 or 0.5 mm with the latter weighing about 5kg (10kb)

Question 13

Lead aprons attenuate at least __% of an incident x-ray beam

Answer 13

90%

Question 14

X ray rooms usually contain ___ mm Pb in their walls

Answer 14

1.6 mm (2m high)

Question 15

Average monthly badge reading for radiology residents is ?

Answer 15

0.07 mSv

Question 16

Technologists working in nuclear medicine are expected to receive effective doses of __ mSv earch year

Answer 16

2 to 3 mSv

Question 17

Public / caput radiation exposure from consumer products and aciviteis

Answer 17

~ 0.1 mSv/year