This atomic bond forms when one when electrons are donated by one atom to
another (bound by the attraction between oppositely-charged ions)
a. covalent bond
b. ionic bond
c. cohesive bond
d. hydrogen bond - CORRECT ANSWER✔✔-B
This atomic bond forms when two atoms share a pair of electrons
a. covalent bond
b. ionic bond
c. cohesive bond
d. hydrogen bond - CORRECT ANSWER✔✔-A
This type of energy transfer is described as the average energy deposited per unit
path length of in soft tissue (keV/um)
a. LET
b. oxygen effect
c. RIB
d. RBE - CORRECT ANSWER✔✔-A
,T or F
As LET increases the ability of radiation to produce biological damage increases. It
is directly proportional. - CORRECT ANSWER✔✔-True
The presence or absence of molecular oxygen within a cell influences the
biological effect of radiation is called
a. Target theory
b. LET
c. RBE
d. Oxygen effect - CORRECT ANSWER✔✔-D
T or F
Oxygen is a radiosensitizer - CORRECT ANSWER✔✔-True
T or F
Well oxygenated cells have a much steeper survival curve - CORRECT
ANSWER✔✔-True
The ratio in cell kill between oxygenated and deoxygenated cells is called the
,a. Oxygen effect
b. Oxygen enhancement ratio
c. LET - CORRECT ANSWER✔✔-B
If 10 Gy of 60Co gamma rays kills 50% of the mice in a group, and 1 Gy of heavy
ion radiotherapy kills the other group, the RBE would be:
a. 10
b. 100
c. 10^8
d. 1000 - CORRECT ANSWER✔✔-A
T or F
As LET increases RBE decreases. - CORRECT ANSWER✔✔-False
Dose from an amount of a test radiation to produce the same biological effect is
called
a. LET
b. RBE
c. oxygen enhancement ratio
d. oxygen effect - CORRECT ANSWER✔✔-B
, RBE is dependent on which of the following:
1 -Type of radiation
2-LET
3 -Type of cell or tissue
4 -Biological effect level
5. -Dose level/Dose rate
a. 1 and 2 only
b. 1 and 5
c. 4 only
d. all of the above - CORRECT ANSWER✔✔-D
Which of the following occurs when the incident photon interacts with a nearby
nucleus creating an electron positive pair:
a. Pair production
b. Compton scatter
c. photoelectric effect - CORRECT ANSWER✔✔-A
If 150 mGy of neutrons produced the same amount of cell death as 650 mGy of
250 kVp x-rays, calculate the RBE:
a. 4.3
another (bound by the attraction between oppositely-charged ions)
a. covalent bond
b. ionic bond
c. cohesive bond
d. hydrogen bond - CORRECT ANSWER✔✔-B
This atomic bond forms when two atoms share a pair of electrons
a. covalent bond
b. ionic bond
c. cohesive bond
d. hydrogen bond - CORRECT ANSWER✔✔-A
This type of energy transfer is described as the average energy deposited per unit
path length of in soft tissue (keV/um)
a. LET
b. oxygen effect
c. RIB
d. RBE - CORRECT ANSWER✔✔-A
,T or F
As LET increases the ability of radiation to produce biological damage increases. It
is directly proportional. - CORRECT ANSWER✔✔-True
The presence or absence of molecular oxygen within a cell influences the
biological effect of radiation is called
a. Target theory
b. LET
c. RBE
d. Oxygen effect - CORRECT ANSWER✔✔-D
T or F
Oxygen is a radiosensitizer - CORRECT ANSWER✔✔-True
T or F
Well oxygenated cells have a much steeper survival curve - CORRECT
ANSWER✔✔-True
The ratio in cell kill between oxygenated and deoxygenated cells is called the
,a. Oxygen effect
b. Oxygen enhancement ratio
c. LET - CORRECT ANSWER✔✔-B
If 10 Gy of 60Co gamma rays kills 50% of the mice in a group, and 1 Gy of heavy
ion radiotherapy kills the other group, the RBE would be:
a. 10
b. 100
c. 10^8
d. 1000 - CORRECT ANSWER✔✔-A
T or F
As LET increases RBE decreases. - CORRECT ANSWER✔✔-False
Dose from an amount of a test radiation to produce the same biological effect is
called
a. LET
b. RBE
c. oxygen enhancement ratio
d. oxygen effect - CORRECT ANSWER✔✔-B
, RBE is dependent on which of the following:
1 -Type of radiation
2-LET
3 -Type of cell or tissue
4 -Biological effect level
5. -Dose level/Dose rate
a. 1 and 2 only
b. 1 and 5
c. 4 only
d. all of the above - CORRECT ANSWER✔✔-D
Which of the following occurs when the incident photon interacts with a nearby
nucleus creating an electron positive pair:
a. Pair production
b. Compton scatter
c. photoelectric effect - CORRECT ANSWER✔✔-A
If 150 mGy of neutrons produced the same amount of cell death as 650 mGy of
250 kVp x-rays, calculate the RBE:
a. 4.3
