Raphex Exam | Actual Questions and Answers
Latest Updated 2024/2025 (Graded A+)
keV
, 364
0
The I-131 gamma rays have a
There is no energy loss in coherent
range of energies. The most
scatter
prevalent (82%) is 364 keV
A depth, distance, and field size
(Dose rate at depth)/(dose rate at specified by the physicist, consistent
dmax) measured at the same SSD with data used for treatment
planning.
Don't know?
2 of 81
Term
What imaging modality does CyberKnife use for target localization?
CBCT
Orthogonal xray
Tomosynthesis
Ultrasound
Give this one a try later!
Improved drr image quality Treat less lung tissue
, Mr image pixel intensities are
Cyberknife uses orthogonal
proportional to tissue electron
xray
density
Don't know?
3 of 81
Definition
A depth, distance, and field size specified by the physicist, consistent
with data used for treatment planning.
Give this one a try later!
A photon counter detects 10,000
Which of the following is not a part of
counts. What is the % uncertainty for
a diagnostic xray machine
the number of counts detected?
waveguide
0.1%
transformer
0.3%
target
1%
rectifier
3%
filament
10%
, Listed below are some elements and
their atomic numbers (Z). Co-60
decays via beta-minus decay to which The output of a linac's photon
of the following isotopes? beam is calibrated to be 1.0
59Fe cGy/MU. This calibration point is
59Co always at:
60Ni
60Cu
Don't know?
4 of 81
Term
Listed below are some elements and their atomic numbers (Z). Co-60
decays via beta-minus decay to which of the following isotopes?
59Fe
59Co
60Ni
60Cu
Give this one a try later!
60Ni
The end result, in beta-min decay, is a neutron converted to a proton and an
electron. Thus Z increases by 1 but the mass number, 60 in this case, remains
the same.
Latest Updated 2024/2025 (Graded A+)
keV
, 364
0
The I-131 gamma rays have a
There is no energy loss in coherent
range of energies. The most
scatter
prevalent (82%) is 364 keV
A depth, distance, and field size
(Dose rate at depth)/(dose rate at specified by the physicist, consistent
dmax) measured at the same SSD with data used for treatment
planning.
Don't know?
2 of 81
Term
What imaging modality does CyberKnife use for target localization?
CBCT
Orthogonal xray
Tomosynthesis
Ultrasound
Give this one a try later!
Improved drr image quality Treat less lung tissue
, Mr image pixel intensities are
Cyberknife uses orthogonal
proportional to tissue electron
xray
density
Don't know?
3 of 81
Definition
A depth, distance, and field size specified by the physicist, consistent
with data used for treatment planning.
Give this one a try later!
A photon counter detects 10,000
Which of the following is not a part of
counts. What is the % uncertainty for
a diagnostic xray machine
the number of counts detected?
waveguide
0.1%
transformer
0.3%
target
1%
rectifier
3%
filament
10%
, Listed below are some elements and
their atomic numbers (Z). Co-60
decays via beta-minus decay to which The output of a linac's photon
of the following isotopes? beam is calibrated to be 1.0
59Fe cGy/MU. This calibration point is
59Co always at:
60Ni
60Cu
Don't know?
4 of 81
Term
Listed below are some elements and their atomic numbers (Z). Co-60
decays via beta-minus decay to which of the following isotopes?
59Fe
59Co
60Ni
60Cu
Give this one a try later!
60Ni
The end result, in beta-min decay, is a neutron converted to a proton and an
electron. Thus Z increases by 1 but the mass number, 60 in this case, remains
the same.
