Chapter 32 Fundamental Principles of Radiobiology-Bushong Test Bank

Chapter 32 Fundamental Principles of Radiobiology Bushong: Radiologic Science for
Technologists




MULTIPLE CHOICE


1. The law of states that the radiosensitivity of living tissue is a
function of the metabolism and maturation of that tissue. a. Watson and Crick
b. Roentgen and Plank
c. Hurter and Driffield
d. Bergonie and Tribondeau




ANS: D
The Law of Bergonie and Tribondeau states that the radiosensitivity of living tissue is a
function of the metabolism and maturation of that tissue.
2. Tissues that are with a metabolic rate are more radiosensitive. a.
immature; low
b. immature; high
c. mature; low
d. mature; high




ANS: B
Tissues that are immature with a high metabolic rate are more radiosensitive.


3. is a measure of the rate that energy is transferred from ionizing radiation to soft tissue.
a. LET
b. RBE

, c. MeV
d. OER




ANS: A
LET is a measure of the rate that energy is transferred from ionizing radiation to soft
tissue.


4. As LET , the RBE .
a. increases; remains the same
b. decreases; remains the same
c. increases; increases
d. increases; decreases




ANS: C
As LET increases, the RBE increases.


5. A protracted dose of radiation is given .
a. over a long period of time
b. all at one short exposure
c. in a series of separate doses
d. in two large doses




ANS: A
A protracted dose of radiation is given over a long period of time.

, 6. A dose of 10 Gy given to a patient in 5 doses of 2 Gy per day is a dose. a.
protracted
b. fractionated
c. diagnostic
d. fatal




ANS: B
A dose of 10 Gy given to a patient in 5 doses of 2 Gy per day is a fractionated dose.


7. The LET of diagnostic x-rays is keV/m.
a. 0.2
b. 0.3
c. 3.0
d. 50




ANS: C The LET of diagnostic x-rays
is 3.0 keV/m.


8. The RBE of diagnostic x-rays is equal to .
a. 20
b. 10
c. 5
d. 1




ANS: D