RAPHEX THERAPY (ACTUAL EXAM)
WITH CORRECT ACTUAL QUESTIONS
AND CORRECTLY WELL DEFINED
ANSWERS LATEST ALREADY
GRADED A+
The dose received at isocenter in a CBCT prior to treatment is
approximately ____ cGy - ANSWER-2-4 cGy
for cranial stereotactic radiosurgery, accuracy and reproducibility
should be on the order of ____mm - ANSWER-2
for an implant, for same initial dose rate, the required total activity of
I-125 will be (greater or less) than that needed of Ir-192 - ANSWER-
greater- lower exposure rate constant
which isotope is created in a cyclotron? - ANSWER-F-18
Patients can be released from the hospital when the projected dose to
individuals around the patient is less than or equal to _____ -
ANSWER-5 mSv
, In hyperthermia the tumor and its vicinity are heated using___ -
ANSWER-microwave radiation
for a 24x24 parallel opposed isocentric 6MV plan, the patient's AP
thickness can be up to ____cm if the max tissue dose is not to exceed
110% of the dose at isocenter - ANSWER-25
btw. universal and dynamic wedges, which requires more MU? -
ANSWER-Universal
btw universal and dynamic wedges, which makes a more penetrating
depth dose? - ANSWER-universal
for which does the wedge transmission factor vary with field size?
universal or dynamic? - ANSWER-both
what is the WAHA equation? - ANSWER-WA=(180-HA)/2
Equation for the gap on the skin surface for a pair of matched fields at
some depth - ANSWER-g=(d/SAD) *(C1+C2)/2
Equation for the RPO gantry angle given the LAO gantry angle -
ANSWER-RPO=LAO+180-(2xdivergence angle)
flattening filters flatten the beam at a depth of - ANSWER-10cm
what two factors are important in selecting a PDD table from
literature for a superficial x-ray unit? - ANSWER-HVL and SSD
dose under a 1.5cm width block of 5 HVL thickness in a 15x15 6MV
photon beam at 5 cm depth due to transmission plus scatter is
approximately ____% of the dose in the open beam - ANSWER-15%
WITH CORRECT ACTUAL QUESTIONS
AND CORRECTLY WELL DEFINED
ANSWERS LATEST ALREADY
GRADED A+
The dose received at isocenter in a CBCT prior to treatment is
approximately ____ cGy - ANSWER-2-4 cGy
for cranial stereotactic radiosurgery, accuracy and reproducibility
should be on the order of ____mm - ANSWER-2
for an implant, for same initial dose rate, the required total activity of
I-125 will be (greater or less) than that needed of Ir-192 - ANSWER-
greater- lower exposure rate constant
which isotope is created in a cyclotron? - ANSWER-F-18
Patients can be released from the hospital when the projected dose to
individuals around the patient is less than or equal to _____ -
ANSWER-5 mSv
, In hyperthermia the tumor and its vicinity are heated using___ -
ANSWER-microwave radiation
for a 24x24 parallel opposed isocentric 6MV plan, the patient's AP
thickness can be up to ____cm if the max tissue dose is not to exceed
110% of the dose at isocenter - ANSWER-25
btw. universal and dynamic wedges, which requires more MU? -
ANSWER-Universal
btw universal and dynamic wedges, which makes a more penetrating
depth dose? - ANSWER-universal
for which does the wedge transmission factor vary with field size?
universal or dynamic? - ANSWER-both
what is the WAHA equation? - ANSWER-WA=(180-HA)/2
Equation for the gap on the skin surface for a pair of matched fields at
some depth - ANSWER-g=(d/SAD) *(C1+C2)/2
Equation for the RPO gantry angle given the LAO gantry angle -
ANSWER-RPO=LAO+180-(2xdivergence angle)
flattening filters flatten the beam at a depth of - ANSWER-10cm
what two factors are important in selecting a PDD table from
literature for a superficial x-ray unit? - ANSWER-HVL and SSD
dose under a 1.5cm width block of 5 HVL thickness in a 15x15 6MV
photon beam at 5 cm depth due to transmission plus scatter is
approximately ____% of the dose in the open beam - ANSWER-15%
