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MDCB practice questions need extra review With 100% SURE ANSWERS
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JACKLINEMDCB practice questions need extra review With 100% SURE ANSWERS
Terms in this set (68)
A patient is to receive 55 Gy to a tumor in the d. utilize a 3DCRT beam arrangement including oblique beam angles.
mediastinum. In order to meet the acceptable
dose limits for the spinal cord, you could:
a. use high energy photon beams to decrease the
entrance dose.
b. block the spinal cord out of all treatment fields
after 40 Gy is delivered.
c. use a BID treatment technique to achieve
greater repair time for the normal tissue cells.
d. utilize a 3DCRT beam arrangement including
oblique beam angles.
Which of the following statements are true for d. decays exclusively by electron capture.
Iodine-125?
a. half-life 86.4 days.
b. has life-long radiation protection issues.
c. energy of 0.412 MeV.
d. decays exclusively by electron capture.
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, 9/5/24, 12:10 PM
The most significant effect(s) of an air cavity in a b. an increased primary photon transmission through the cavity.
megavoltage beam treatment is:
a. a change in the spectral energy distribution
within the cavity.
b. an increased primary photon transmission
through the cavity.
c. an enhanced absorption of dose in and beyond
the cavity.
d. a partial gain of electronic equilibrium at the
cavity interface.
For patients with limited life expectancy the a. 800cGy in 1 fraction.
common dose fractionation for cord compression
is:
a. 800cGy in 1 fraction.
b. 2000cGy in 5 fractions.
c. 3000cGy in 10 fractions.
d. 3750cGy in 15 fractions.
Mayneord F factor corrects PDD for: b. Inverse square- does not correct for scatter
a. heterogeneity.
b. scatter.
c. Inverse square.
d. exponential attenuation.
For quality assurance of brachytherapy treatment b. +- 2%
planning computers, the dose rates should agree
with published data tables to which of the
following degrees?
a. +- 1%
b. +- 2%
c. +- 3%
d. +- 5%
The expected accuracy of treatment planning b. +/- 5%
systems that perform brachytherapy dose
calculations should be within: a. +/- 3%
b. +/- 5%
c. +/- 7%
d. +/- 10%
MDCB practice questions need extra review
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