MDCB UPDATED EXAM TEST PAPER QUESTIONS AND
ANSWERS MARKED A+
✔✔MVCT - ✔✔A disadvantage of the Tomotherapy system is:
✔✔55 Gy - ✔✔During tx of a rectum, 50% of the bladder should recieve no more than
what dose?
✔✔Dd/ Ddmax under SSD conditions - ✔✔PDD =
✔✔entrance and exit of each field at dmax level and off to the side - ✔✔Where is the
global hot spot in a AP/PA field arrangement?
✔✔ICRU 83 - ✔✔Dose prescribing, recording, and reporting in IMRT s discussed in
which ICRU report?
✔✔The ratio of the volume of 50% of the Rx dose to the volume of the PTV - ✔✔SBRT
utilizes a factor called R50. What does it represent?
✔✔T2 - ✔✔The suprasternal notch is located at what vertebral level?
✔✔M, G2, G1, Early S, Late S - ✔✔List in order from most to least sensitive the parts of
the cell cycle.
✔✔CTDIvol x scan length - ✔✔DLP =
✔✔L1 - ✔✔The hilum of the rt kidney is located at what vertebral level?
✔✔2 MeV/ cm - ✔✔Electron energy loss =
✔✔TG 53 - ✔✔What task group addresses TPS testing and QA?
✔✔1.06 - ✔✔What is the average density of muscle
✔✔120 mm - ✔✔In an adult the approximate length of a rectum in mm is?
✔✔NCRP 147 - ✔✔Shielding Ref for Diagnostic x-ray and CT is found in which
document?
✔✔5000 cGy - ✔✔What is the RTOG tolerance dose for a femoral head
✔✔8.06 days - ✔✔The half life for the isotope used for the treatment of thyroid cancer is
approximately:
,✔✔distal part of the bragg-peak - ✔✔The RBE for protons is the highest at what part of
the Bragg curve
✔✔Co60, CS137, Ir192, I125 - ✔✔List from highest to lowest the HVL for the respective
isotopes: Co60, I125, Cs137, Ir192
✔✔Cs137 - ✔✔Which has the highest energy: Cs137, I125, F18, Pd103?
✔✔Pd103 - ✔✔Which has the lowest energy: Cs137,I125, F18, Pd103?
✔✔8.30 MeV - ✔✔The average energy of a 25 MV photon beam is
✔✔Z^2 - ✔✔Pair production is proportional to Z in what way?
✔✔10% - ✔✔Prior to a prostate seed implant a sample of the seeds needs to be
sampled for a calibration check. What is the required sampling?
✔✔<10% - ✔✔Identify the V20 for lungs for SBRT
✔✔5000cGy - ✔✔Pathologic fracture of the ribs can occur at what dose?
✔✔</= 0.005 uCi - ✔✔What is the radiation safety limit for a sealed source wipe test?
✔✔16Mev - ✔✔Calculate the electron energy required to achieve 90% coverage on a
lesion that is at a depth of 5 cm?
✔✔1/2 - ✔✔The reccomended occupancy factor, T for a pt exam room is:
✔✔Compton scatter - ✔✔A 1.022 MeV photon will most likely interact how?
✔✔Z^3 - ✔✔Photoelectric effect is proportional to Z in what way?
✔✔The ratio of the volume of 50% of the RX dose isodose to the volume of the PTV -
✔✔R50 is defined as
✔✔interstitial - ✔✔Brachytherapy tx for sarcomas are carried out using what method?
✔✔Borated Polyurethylene - ✔✔When shielding a vault door for neutron contaimination
the best material to use is:
✔✔26 Gy - ✔✔What is the tolerence dose for the parotid gland?
✔✔2600cGy - ✔✔The ideal mean dose limit for a single parotid gland is what?
, ✔✔3D arc therapy - ✔✔The tx planning method of past pointing is used in
✔✔6Mv - ✔✔A cyberknife unit uses what specific energy for tx?
✔✔1.0 mm - ✔✔Daily QA tolerances for laser localization for SRS in TG 142 is:
✔✔NCRP 151 - ✔✔The reference for linac shielding is found in which document?
✔✔g * Gy - ✔✔The units of integral dose are
✔✔0.1155 - ✔✔What is the decay constant of Tc99m
✔✔distal edge of bragg peak - ✔✔The RBE for protons is highest where?
✔✔0.058 / cm - ✔✔The HVL thickness of a given material is 12 cm. What is its linear
coefficient?
✔✔Monte carlo - ✔✔Derivation of dose kernals come from
✔✔table travel/ beam width - ✔✔The formula for pitch in CT is
✔✔30 Mev - ✔✔In treating ocular lesions with protons, what energy would you use?
✔✔10 mSv - ✔✔What would a typical effective dose for a CT of the ABD or chest be?
✔✔4.3 cm - ✔✔Calculate the D80 doe a 12 MeV beam
✔✔Tesla - ✔✔In MRI the magnetic field strength used is measured in
✔✔interlumen - ✔✔Brachytherapy tx on the lung are carried out using what method?
✔✔6MV photon - ✔✔The highest curent can be found with which linac energy?
✔✔between C5-T1 - ✔✔The brachial plexus is located where
✔✔Phosphorus - ✔✔What type of isotope is used to tx polycythemia vera?
✔✔SUM P(Drx - Dplan)^2 - ✔✔What is the equation for IMRT cost function?
✔✔</= 10% - ✔✔In SBRT lung tx the V20 should be
✔✔Ddmax/Dair - ✔✔BSF =
ANSWERS MARKED A+
✔✔MVCT - ✔✔A disadvantage of the Tomotherapy system is:
✔✔55 Gy - ✔✔During tx of a rectum, 50% of the bladder should recieve no more than
what dose?
✔✔Dd/ Ddmax under SSD conditions - ✔✔PDD =
✔✔entrance and exit of each field at dmax level and off to the side - ✔✔Where is the
global hot spot in a AP/PA field arrangement?
✔✔ICRU 83 - ✔✔Dose prescribing, recording, and reporting in IMRT s discussed in
which ICRU report?
✔✔The ratio of the volume of 50% of the Rx dose to the volume of the PTV - ✔✔SBRT
utilizes a factor called R50. What does it represent?
✔✔T2 - ✔✔The suprasternal notch is located at what vertebral level?
✔✔M, G2, G1, Early S, Late S - ✔✔List in order from most to least sensitive the parts of
the cell cycle.
✔✔CTDIvol x scan length - ✔✔DLP =
✔✔L1 - ✔✔The hilum of the rt kidney is located at what vertebral level?
✔✔2 MeV/ cm - ✔✔Electron energy loss =
✔✔TG 53 - ✔✔What task group addresses TPS testing and QA?
✔✔1.06 - ✔✔What is the average density of muscle
✔✔120 mm - ✔✔In an adult the approximate length of a rectum in mm is?
✔✔NCRP 147 - ✔✔Shielding Ref for Diagnostic x-ray and CT is found in which
document?
✔✔5000 cGy - ✔✔What is the RTOG tolerance dose for a femoral head
✔✔8.06 days - ✔✔The half life for the isotope used for the treatment of thyroid cancer is
approximately:
,✔✔distal part of the bragg-peak - ✔✔The RBE for protons is the highest at what part of
the Bragg curve
✔✔Co60, CS137, Ir192, I125 - ✔✔List from highest to lowest the HVL for the respective
isotopes: Co60, I125, Cs137, Ir192
✔✔Cs137 - ✔✔Which has the highest energy: Cs137, I125, F18, Pd103?
✔✔Pd103 - ✔✔Which has the lowest energy: Cs137,I125, F18, Pd103?
✔✔8.30 MeV - ✔✔The average energy of a 25 MV photon beam is
✔✔Z^2 - ✔✔Pair production is proportional to Z in what way?
✔✔10% - ✔✔Prior to a prostate seed implant a sample of the seeds needs to be
sampled for a calibration check. What is the required sampling?
✔✔<10% - ✔✔Identify the V20 for lungs for SBRT
✔✔5000cGy - ✔✔Pathologic fracture of the ribs can occur at what dose?
✔✔</= 0.005 uCi - ✔✔What is the radiation safety limit for a sealed source wipe test?
✔✔16Mev - ✔✔Calculate the electron energy required to achieve 90% coverage on a
lesion that is at a depth of 5 cm?
✔✔1/2 - ✔✔The reccomended occupancy factor, T for a pt exam room is:
✔✔Compton scatter - ✔✔A 1.022 MeV photon will most likely interact how?
✔✔Z^3 - ✔✔Photoelectric effect is proportional to Z in what way?
✔✔The ratio of the volume of 50% of the RX dose isodose to the volume of the PTV -
✔✔R50 is defined as
✔✔interstitial - ✔✔Brachytherapy tx for sarcomas are carried out using what method?
✔✔Borated Polyurethylene - ✔✔When shielding a vault door for neutron contaimination
the best material to use is:
✔✔26 Gy - ✔✔What is the tolerence dose for the parotid gland?
✔✔2600cGy - ✔✔The ideal mean dose limit for a single parotid gland is what?
, ✔✔3D arc therapy - ✔✔The tx planning method of past pointing is used in
✔✔6Mv - ✔✔A cyberknife unit uses what specific energy for tx?
✔✔1.0 mm - ✔✔Daily QA tolerances for laser localization for SRS in TG 142 is:
✔✔NCRP 151 - ✔✔The reference for linac shielding is found in which document?
✔✔g * Gy - ✔✔The units of integral dose are
✔✔0.1155 - ✔✔What is the decay constant of Tc99m
✔✔distal edge of bragg peak - ✔✔The RBE for protons is highest where?
✔✔0.058 / cm - ✔✔The HVL thickness of a given material is 12 cm. What is its linear
coefficient?
✔✔Monte carlo - ✔✔Derivation of dose kernals come from
✔✔table travel/ beam width - ✔✔The formula for pitch in CT is
✔✔30 Mev - ✔✔In treating ocular lesions with protons, what energy would you use?
✔✔10 mSv - ✔✔What would a typical effective dose for a CT of the ABD or chest be?
✔✔4.3 cm - ✔✔Calculate the D80 doe a 12 MeV beam
✔✔Tesla - ✔✔In MRI the magnetic field strength used is measured in
✔✔interlumen - ✔✔Brachytherapy tx on the lung are carried out using what method?
✔✔6MV photon - ✔✔The highest curent can be found with which linac energy?
✔✔between C5-T1 - ✔✔The brachial plexus is located where
✔✔Phosphorus - ✔✔What type of isotope is used to tx polycythemia vera?
✔✔SUM P(Drx - Dplan)^2 - ✔✔What is the equation for IMRT cost function?
✔✔</= 10% - ✔✔In SBRT lung tx the V20 should be
✔✔Ddmax/Dair - ✔✔BSF =
