MDCB COMPREHENSIVE QUESTIONS AND ANSWERS
SET A+
✔✔List in order from least sensitive to most sensitive the parts of the cell cycle. -
✔✔Late S
Early S
G1
G2/M
M
✔✔IMRT Optimizer equation - ✔✔∑ P (DRX - DPLAN)^2
(what u want - plan)^2
✔✔Rank the following wavelengths from shortest to longest. - ✔✔Gamma Ray
UV
Visible Light
Microwave
✔✔Linear attenuation coefficients are represented by what units? - ✔✔1/cm
✔✔In a Tandem and Ovoid procedure the location of Point B is: - ✔✔At the pelvic
sidewall/obturator nodes
2 cm up from Os, 5 cm lateral from midline
✔✔Tandem and Ovoid dose equation for A and B - ✔✔Dose at pt. B = dose at Pt. A/3
✔✔In a Tandem and Ovoid procedure the location of Point A is: - ✔✔uterine vessels
cross ureter
2 cm up from Os, 2 cm lateral to cervical canal (applicator)
, ✔✔Irreversible damage to the ovaries can occur at what dose? - ✔✔5 Gy
✔✔Electron energy loss per centimeter is: - ✔✔2 MeV/cm
✔✔Daily QA tolerances for laser localization for simulators in task group 40 are: -
✔✔2mm
✔✔Tissue maximum ratios are dependent on which factors? - ✔✔Depth
field size
energy
✔✔List from highest to lowest the HVL for the respective isotopes:
Co-60
I-125
Cs-137
Ir-192 - ✔✔Co-60
Cs-137
Ir-192
I-125
✔✔Standardized uptake values in PET imaging are defined as: - ✔✔Concentration in
ROI / (Injected Dose/Body Mass)
✔✔What location is the brachial plexus situated at? - ✔✔between C5 - T1
✔✔definition of a point source - ✔✔if the distance is more than 2x the length of the
source
✔✔Dose prescribing, recording and reporting in intensity-modulated radiation therapy in
discussed in which ICRU report? - ✔✔ICRU 83
✔✔What is the decay constant of Technetium 99m? - ✔✔0.1155/hr
✔✔Backscatter factor is defined as: - ✔✔Ddmax /Dair
✔✔The acronym TERMA stands for what? - ✔✔Total Energy Release per unit Mass
✔✔When treating with a single fraction in SRS treatment, what constraint is placed on
the spinal cord? - ✔✔1300 cGy
✔✔The acronym SOBP stands for: - ✔✔Spread out Bragg peak
✔✔Rank the following techniques from lowest to highest integral dose
SET A+
✔✔List in order from least sensitive to most sensitive the parts of the cell cycle. -
✔✔Late S
Early S
G1
G2/M
M
✔✔IMRT Optimizer equation - ✔✔∑ P (DRX - DPLAN)^2
(what u want - plan)^2
✔✔Rank the following wavelengths from shortest to longest. - ✔✔Gamma Ray
UV
Visible Light
Microwave
✔✔Linear attenuation coefficients are represented by what units? - ✔✔1/cm
✔✔In a Tandem and Ovoid procedure the location of Point B is: - ✔✔At the pelvic
sidewall/obturator nodes
2 cm up from Os, 5 cm lateral from midline
✔✔Tandem and Ovoid dose equation for A and B - ✔✔Dose at pt. B = dose at Pt. A/3
✔✔In a Tandem and Ovoid procedure the location of Point A is: - ✔✔uterine vessels
cross ureter
2 cm up from Os, 2 cm lateral to cervical canal (applicator)
, ✔✔Irreversible damage to the ovaries can occur at what dose? - ✔✔5 Gy
✔✔Electron energy loss per centimeter is: - ✔✔2 MeV/cm
✔✔Daily QA tolerances for laser localization for simulators in task group 40 are: -
✔✔2mm
✔✔Tissue maximum ratios are dependent on which factors? - ✔✔Depth
field size
energy
✔✔List from highest to lowest the HVL for the respective isotopes:
Co-60
I-125
Cs-137
Ir-192 - ✔✔Co-60
Cs-137
Ir-192
I-125
✔✔Standardized uptake values in PET imaging are defined as: - ✔✔Concentration in
ROI / (Injected Dose/Body Mass)
✔✔What location is the brachial plexus situated at? - ✔✔between C5 - T1
✔✔definition of a point source - ✔✔if the distance is more than 2x the length of the
source
✔✔Dose prescribing, recording and reporting in intensity-modulated radiation therapy in
discussed in which ICRU report? - ✔✔ICRU 83
✔✔What is the decay constant of Technetium 99m? - ✔✔0.1155/hr
✔✔Backscatter factor is defined as: - ✔✔Ddmax /Dair
✔✔The acronym TERMA stands for what? - ✔✔Total Energy Release per unit Mass
✔✔When treating with a single fraction in SRS treatment, what constraint is placed on
the spinal cord? - ✔✔1300 cGy
✔✔The acronym SOBP stands for: - ✔✔Spread out Bragg peak
✔✔Rank the following techniques from lowest to highest integral dose
