Radiation Therapy II Ch 7 Radiation Quantities - Exam review

The primary reason for monitoring, predicting, and standardizing radiation is:
a. ensuring dose to tumor is enough
b. avoiding exceeding tolerance doses
c. ensuring dose to patient is kept as low as possible
d. all of the above

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The primary reason for monitoring, predicting, and standardizing radiation is:
a. ensuring dose to tumor is enough
b. avoiding exceeding tolerance doses
c. ensuring dose to patient is kept as low as possible
d. all of the above

d. all of the above

The primary disadvantage to using an MV photon beam is:
a. dose buildup
b. skin sparring
c. dose follow-through
d. lack of skin sparring

c. dose follow-through

True or false: Increasing skin sparring reduces the side effects of radiation

True or false: The first unit used for measuring exposure to the patient provided an accurate assumption of absorbed dose

False: The original unit for measuring radiation dose (skin erythema dose) did not factor in patient-specific factors, as well as did not take into account the tolerance doses for any internal organs

The original unit for measuring exposure was the:
a. rad
b. skin erythema dose
c. cGy
d. roentgen (R)

b. skin erythema dose

The measure of ionization in the air refers to:
a. exposure
b. absorbed dose
c. kerma
d. equivalent dose (EqD)

In diagnostic radiography, exposure is a good way of measuring the ___ of the beam:
a. input
b. output
c. probability of producing diagnostically serviceable photons
d. penetration

The first truly utilized unit of exposure wasn't adopted until:
a. 1905
b. 1913
c. 1928
d. 1933

The first truly utilized unit of exposure was the:
a. rad
b. skin erythema dose
c. cGy
d. roentgen (R)

d. roentgen (R)

1 ___ = ___ C/kg
a. Gy; 2.58x10^-4
b. R; 3876
c. R; 2.58x10^-4
d. Gy; 3.7x10^10

c. R; 2.58x10^-4