Question
In: Physics
In beam modelling with Pinnacle RTPS, Explain why there may be a difference in the X...
In beam modelling with Pinnacle RTPS, Explain why there may be a difference in the X and Y profiles, there are two main reasons.
Solutions
genius_generous answered 1 year agoRelated Solutions
In beam modelling with Pinnacle RTPS , What are three modelling elements that affect the “out-of-field”...
In beam modelling with Pinnacle RTPS , What are three modelling
elements that affect the “out-of-field” dose?
In beam modelling with Pinnacle RTPS, What is the role of the flattening filter? What is...
In beam modelling with Pinnacle RTPS, What is the role of the
flattening filter? What is the advantage of flattening filter free
and what is the main restriction.
In beam modelling with Pinnacle RTPS, What is the definition of a “harder spectrum”? How would...
In beam modelling with Pinnacle RTPS, What is the definition of
a “harder spectrum”? How would a “harder” 6MV spectrum change
theshape of the corresponding percentage depth-dose curve?
In beam modelling with Pinnacle RTPS, The source size is defined to give geometric penumbra width,...
In beam modelling with Pinnacle RTPS, The source size is defined
to give geometric penumbra width, explain what else contributes to
thepenumbra width? Explain why width of D80-20 is used
to characterise penumbra width? Would the D80-20be
wider or narrower at high energy and why?
In beam modelling with Pinnacle RTPS, Define in words and describe mathematically the two main components...
In beam modelling with Pinnacle RTPS, Define in words and
describe mathematically the two main components of
Superposition/convolution
In beam modelling with Pinnacle RTPS, For a 6MV beam:a) What is the maximum photon energy?b)...
In beam modelling with Pinnacle RTPS,
For a 6MV beam:a) What is the maximum photon energy?b) What is
the mean (roughly) photon energy?c) How does the spectrum affect
the depth dose penetration?
In beam modelling with Pinnacle RTPS, Define parameters used in depth dose profiles and cross-axis profiles...
In beam modelling with Pinnacle RTPS, Define parameters used in
depth dose profiles and cross-axis profiles (e.g.
TPR20/10, Dmax, dmax).
a. Explain why filtering of an X-ray beam causes a simultaneous decrease in beam quantity and...
a. Explain why filtering of an X-ray beam causes a simultaneous
decrease in beam quantity and increase in quality [a diagram may be
useful]
b. The two main mechanisms by which X-rays interact with matter
are via Compton scattering and absorption by the photoelectric
effect. By referring to the dependence of these effects on X-ray
energy, explain what happens to X-ray image quality when using
excessively high tube voltages
Explain the general concept of a force field in molecular modelling and explain why it might...
Explain the general concept of a force field in molecular
modelling and explain why it might be used instead of a
first-principles method.
Briefly explain the difference between electron beam and laser diffraction.
Briefly explain the difference between electron beam and laser
diffraction.
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