What are the main parameters in external beam dose delivery?
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-Depth of Treatment
-Field Size
-SSD in SSD set-ups
-SAD in SAD set-ups
-photon beam energy
-Number of photons
-Treatment time for orthovoltage and superficial
-Number of MU in linacs
What are conditions for any particle accelerator?
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, -The particle must be charged, and an electric field must point in the
direction of particle acceleration.
Dosimetric functions are used to relate treatment time or MU's to a particular dose in
the patient. List some examples:
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-PDD
-Collimator factor
-Relative dose factor (RDF)
-Tissue-phantom ratio (TPR)
-Tissue-Air ratio (TAR)
-Peak Scatter Factor (PSF)
-Scatter Factor (SF)
-Tissue Maximum Ratio (TMR)
What are normalisation conventions for isodose charts?
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For SSD set-ups, all isodose values are normalised to 100 at point P on CAX
For SAD setup, the isodose values are normalised to 100 at the isocenter
What is the spread of electron beam isodose profiles influenced by?
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Give this one a try later!
-Depth of Treatment
-Field Size
-SSD in SSD set-ups
-SAD in SAD set-ups
-photon beam energy
-Number of photons
-Treatment time for orthovoltage and superficial
-Number of MU in linacs
What are conditions for any particle accelerator?
Give this one a try later!
, -The particle must be charged, and an electric field must point in the
direction of particle acceleration.
Dosimetric functions are used to relate treatment time or MU's to a particular dose in
the patient. List some examples:
Give this one a try later!
-PDD
-Collimator factor
-Relative dose factor (RDF)
-Tissue-phantom ratio (TPR)
-Tissue-Air ratio (TAR)
-Peak Scatter Factor (PSF)
-Scatter Factor (SF)
-Tissue Maximum Ratio (TMR)
What are normalisation conventions for isodose charts?
Give this one a try later!
For SSD set-ups, all isodose values are normalised to 100 at point P on CAX
For SAD setup, the isodose values are normalised to 100 at the isocenter
What is the spread of electron beam isodose profiles influenced by?
Give this one a try later!
