What is used to account for the differences in tissue sensitivity to ionizing radiation when determining effective dose E
Choose all that apply
1. Tissue weighting factors Wt
2. Radiation weighting factors Wr
3. Absorbed dose - ANS 1. Tissue weighting factors Wt
Bushong 8th editi...
The radiation ______ is a number assigned to different types of ______ in order to better
determine their effect on tissue examples xray vs alpha particles.
1. Tissue weighting factors Wt/ionizing radiations
D
2. weighting factor Wr/ionizing radiations
3. Absorbed dose/ionizing radiations - ANS 2. weighting factor Wr/ionizing radiations
U
Bushong 8th edition page 556
ST
The Wr of the different ionizing radiations depends on the ______ of that particular radiation.
1. BET
2. EBT
3. LET - ANS 3. LET
Bushong 8th edition page 556
The following formula is used to determine effective dose E:
1. E=Wr x Wt x absorbed dose
,2. E=Wr + Wt + absorbed dose
3. E=Wr - Wt - absorbed dose - ANS 1. E=Wr x Wt x absorbed dose
Bushong 8th edition page 556
According to the national council on radiation protection and measurements NCRP, the monthly
gestational dose equivalent limit for embryo/fetus of a pregnant radiographer is
a. 0.1 mSv
b. 0.5 mSv
K
c. 1.0 mSv
d. 5.0 mSv - ANS b. 0.5 mSv
C
Bushong 8th edition page 557
________ which expresses the rate at which particulate or photon energy is transferred to the
LO
absorber
1. BET
2. EBT
3. LET - ANS 3. LET
YC
Thompson et al page 419
LET is best defined as
Choose all that apply
D
1. a method of expressing radiation
2. a measure of the rate at which radiation energy is transferred to soft tissue
3. absorption of polyenergetic radiation - ANS 1. a method of expressing radiation
U
2. a measure of the rate at which radiation energy is transferred to soft tissue
Thompson et al page 419
ST
Guidelines state that the occupational gestational dose equivalent limit for embryo/fetus of a
pregnant radiographer is ______, not to exceed ______in 1 month
a. 5 mSv aka 500 mrem
b. 5 mSv aka 200 mrem
c. 5 mSv aka 100 mrem - ANS a. 5 mSv aka 500 mrem/0.5 mSv
Bushong 8th edition page 557
, According to the NCRP the annual occupational whole body dose equivalent limit is _____ mSv
(5 rem or 5,000 mrem).
A. 20
B. 30
C. 50 - ANS C. 50 mSv
Bushong 8th edition page 557
K
The annual occupational whole body dose equivalent limit for students under the age of 18
years is 1 mSv aka 100 mrem or 0.1 rem.
C
a. 10 mSv
b. 100 mSv
c. 1 mSv - ANS c. 1 mSv
LO
Bushong 8th edition page 557
YC
The annual occupational dose equivalent limit for the lens of eye is ______
a. 350 mSv aka 15 rem
b. 550 mSv aka 15 rem
c. 150 mSv aka 15 rem - ANS c. 150 mSv aka 15 rem
D
Bushong 8th edition page 557
U
The annual occupational dose equivalent limit for the thyroid, skin and extremities is _______
a. 200 mSv aka 50 rem.
ST
b. 300 mSv aka 50 rem.
c. 500 mSv aka 50 rem. - ANS c. 500 mSv aka 50 rem
Bushong 8th edition page 557
A time of 1.5 minutes is required for a particular fluoroscopic examination, whose exposure rate
is 275 mR/h. What is the approximate radiation exposure for the radiologic staff present in the
fluoroscopy room during the examination
a. 183 mR
b. 68.7 mR
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