Mosby's Radiation Therapy Practice Board
Exam 1
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When a missing tissue compensator At some distance from the skin surface
is used, it should be placed:
a. directly on the skin surface
b. at some distance from the skin
surface
c. on the end of an electron cone
d. on top of a bolus material at iso
All of the following are signs of Vaginal bleeding
ovarian cancer except:
a. vaginal bleeding
b. abdominal bloating
c. constipation
d. nausea
,While treating a patient with painful Eliminate clothing in the area of treatment
boney metastasis, it is desirable to:
rationale: although it may be more comfortable for
a. eliminate clothing in the area of patients in pain to have soft clothing and sheets to
treatment rest on, it is best practice to remove all clothing
b. raise clothing so that marks are and bed dressings in the area of treatment to
visualized prevent unnecessary dose build up.
c. keep the sheet and blanket under
the patient for comfort
d. keep the patient on the gurney to
prevent heightened pain
If the cGy/MU is 1.0 at 100 SSD, what 0.25 cGy/MU
is the cGy/MU at 200 cm SSD?
Inverse Square Formula
a. 0.25 cGy/MU
b. 2.0 cGy/MU
c. 0.5 cGy/MU
d. 4.0 cGy/MU
, For a field treated with the isocenter 17.5 x 21.9
at a depth of 12.5 cm on a 100 cm
SAD LINAC, the collimator setting is Use direct proportion
20 x 25. The field would measure _____
on the patient's skin surface.
a. 20 x 25
b. 7.5 x 12.5
c. 17.5 x 12.9
d. 22.9 x 28.6
The eq. square field size must be Dose to be delivered to the central axis
determined in order to calculate the:
Eq. square is necessary to calculate the dose to be
a. dose to be delivered to the central delivered to the central axis of a non-square field
axis
b. relative dose values from a
reference beam
c. spread of the beam from a certain
distance
d. air gap on the patient's external
contours
If custom blocks need to be used, Decrease
the shadow tray will _____ the output
Inserting accessories in the path of the beam will
a. increase attenuate the beam and decrease the output.
b. decrease Transmission factors should be included in dose
c. not effect calculations to compensate for the change in
d. slow output
Exam 1
Leave the first rating
Save
Terms in this set (50) Hide definitions
When a missing tissue compensator At some distance from the skin surface
is used, it should be placed:
a. directly on the skin surface
b. at some distance from the skin
surface
c. on the end of an electron cone
d. on top of a bolus material at iso
All of the following are signs of Vaginal bleeding
ovarian cancer except:
a. vaginal bleeding
b. abdominal bloating
c. constipation
d. nausea
,While treating a patient with painful Eliminate clothing in the area of treatment
boney metastasis, it is desirable to:
rationale: although it may be more comfortable for
a. eliminate clothing in the area of patients in pain to have soft clothing and sheets to
treatment rest on, it is best practice to remove all clothing
b. raise clothing so that marks are and bed dressings in the area of treatment to
visualized prevent unnecessary dose build up.
c. keep the sheet and blanket under
the patient for comfort
d. keep the patient on the gurney to
prevent heightened pain
If the cGy/MU is 1.0 at 100 SSD, what 0.25 cGy/MU
is the cGy/MU at 200 cm SSD?
Inverse Square Formula
a. 0.25 cGy/MU
b. 2.0 cGy/MU
c. 0.5 cGy/MU
d. 4.0 cGy/MU
, For a field treated with the isocenter 17.5 x 21.9
at a depth of 12.5 cm on a 100 cm
SAD LINAC, the collimator setting is Use direct proportion
20 x 25. The field would measure _____
on the patient's skin surface.
a. 20 x 25
b. 7.5 x 12.5
c. 17.5 x 12.9
d. 22.9 x 28.6
The eq. square field size must be Dose to be delivered to the central axis
determined in order to calculate the:
Eq. square is necessary to calculate the dose to be
a. dose to be delivered to the central delivered to the central axis of a non-square field
axis
b. relative dose values from a
reference beam
c. spread of the beam from a certain
distance
d. air gap on the patient's external
contours
If custom blocks need to be used, Decrease
the shadow tray will _____ the output
Inserting accessories in the path of the beam will
a. increase attenuate the beam and decrease the output.
b. decrease Transmission factors should be included in dose
c. not effect calculations to compensate for the change in
d. slow output
