MDCB CORE MAIN QUESTIONS AND ANSWERS SET
A+
✔✔What is the RBE for protons? - ✔✔1.1
✔✔How much energy does a particle lose per cm - ✔✔2 MeV /cm
✔✔The most common childhood cancer is: - ✔✔Acute Lymphocytic Leukemia
✔✔The V20 planning constraint for the kidney is: - ✔✔V20 <32%
✔✔AAPM TG-36 is a document that gives recommendations on what? - ✔✔Fetal Dose
from Radiotherapy
✔✔conversion from MBq to mCi - ✔✔1 mCi = 37 MBq
✔✔Stainless steel has a physical density of what amount? - ✔✔8 g/cm^3
✔✔List from lowest to highest the CT numbers of the respective tissues:
fat
bone
thyroid
lung
kidney - ✔✔Lung
fat
kidney
thyroid
bone
✔✔Task group 100 gives recommendations on what subject? - ✔✔Risk Management
✔✔Identify the Quantec rectal constraint of 50%: - ✔✔V50
, ✔✔When using a single fraction SRS treatment, what constraint is placed on the spinal
cord? - ✔✔13 Gy
✔✔What is the RTOG tolerance dose for the optic nerve? - ✔✔5400 cGy
✔✔The four R's of fractionated radiation biology are: - ✔✔Repair
Reoxygenation
Repopulation
Redistribution
✔✔T1 imaging in MRI displays white matter as? - ✔✔Dark Grey
✔✔The V25 planning constraint for the heart is: - ✔✔V25<10%
✔✔In MRI the magnetic field strength used is measured in: - ✔✔tesla
✔✔Computer tomography resolution is approximately: - ✔✔0.5mm
✔✔The alpha/beta ratio for colon? - ✔✔10
✔✔Derivation of dose kernals come from: - ✔✔Monte Carlo
✔✔An AP/PA arrangement generates a hot spot in the following location: - ✔✔Entrance
and exit of each field at the depth of dmax
✔✔Isotones have the same number of which particle? - ✔✔Neutrons
the N in isotones
✔✔List in order from lowest energy to highest energy for the following isotopes:
Ir-192, Au-198, Pd-103, Ra-226, Cs-137 - ✔✔Pd-103
Ir-192
Au-198
Cs-137
Ra-226
✔✔MF Equation - ✔✔first is 2 over 1 with d
second is 1 over 2 for dmax
(SSD2+d)/(SSD1+d)^2 * (SSD1+dmax)/(SSD2+dmax)^2
✔✔The exposure rate limit to the General Public in any single hour should be <: - ✔✔2
mR/hr
A+
✔✔What is the RBE for protons? - ✔✔1.1
✔✔How much energy does a particle lose per cm - ✔✔2 MeV /cm
✔✔The most common childhood cancer is: - ✔✔Acute Lymphocytic Leukemia
✔✔The V20 planning constraint for the kidney is: - ✔✔V20 <32%
✔✔AAPM TG-36 is a document that gives recommendations on what? - ✔✔Fetal Dose
from Radiotherapy
✔✔conversion from MBq to mCi - ✔✔1 mCi = 37 MBq
✔✔Stainless steel has a physical density of what amount? - ✔✔8 g/cm^3
✔✔List from lowest to highest the CT numbers of the respective tissues:
fat
bone
thyroid
lung
kidney - ✔✔Lung
fat
kidney
thyroid
bone
✔✔Task group 100 gives recommendations on what subject? - ✔✔Risk Management
✔✔Identify the Quantec rectal constraint of 50%: - ✔✔V50
, ✔✔When using a single fraction SRS treatment, what constraint is placed on the spinal
cord? - ✔✔13 Gy
✔✔What is the RTOG tolerance dose for the optic nerve? - ✔✔5400 cGy
✔✔The four R's of fractionated radiation biology are: - ✔✔Repair
Reoxygenation
Repopulation
Redistribution
✔✔T1 imaging in MRI displays white matter as? - ✔✔Dark Grey
✔✔The V25 planning constraint for the heart is: - ✔✔V25<10%
✔✔In MRI the magnetic field strength used is measured in: - ✔✔tesla
✔✔Computer tomography resolution is approximately: - ✔✔0.5mm
✔✔The alpha/beta ratio for colon? - ✔✔10
✔✔Derivation of dose kernals come from: - ✔✔Monte Carlo
✔✔An AP/PA arrangement generates a hot spot in the following location: - ✔✔Entrance
and exit of each field at the depth of dmax
✔✔Isotones have the same number of which particle? - ✔✔Neutrons
the N in isotones
✔✔List in order from lowest energy to highest energy for the following isotopes:
Ir-192, Au-198, Pd-103, Ra-226, Cs-137 - ✔✔Pd-103
Ir-192
Au-198
Cs-137
Ra-226
✔✔MF Equation - ✔✔first is 2 over 1 with d
second is 1 over 2 for dmax
(SSD2+d)/(SSD1+d)^2 * (SSD1+dmax)/(SSD2+dmax)^2
✔✔The exposure rate limit to the General Public in any single hour should be <: - ✔✔2
mR/hr
