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23 Cards in this Set
- Front
- Back
tempature conversion
C to F |
C x 1.8 + 32 = F
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Tempature conversion
F to C |
(F - 32) x 1.8 = C
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Effective Field size
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Larger FS - Smaller FS = square root of answer
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treatmemt error
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(intended) squared
____________ (actual) squared |
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Maynard F factor
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(SSD2+Dmax)/(SSD2+d) squared
__________________________________ (SSD1+Dmax)/(SSD1+d) squared F Factor x original PDD = New PDD |
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ISF
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(SSD1) squared
________________ (SSD2) squared |
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pressure corretion
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760 x 273.5 + Temp
_____ ______________ P 295.5 |
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field size
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A = a
___ ____ B b |
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equivelent square
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4 x area/perimeter
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inverse square
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I1 = (D2) squared
__ _____________ I2 (D1) squared |
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skin gap
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(L1 x d) + (L2 x d)
____ ___ _____ ___ (2 SSD1) (2 SSD2) |
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wedge angle
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(180 - hinge angle)
___________________ = Wedge angle 2 |
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beam divergence
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(edge lenght)
______________ /100 then 2nd tan 2 |
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MU (using PDD)
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Prescribed dose
______________________________ RDR x ISCF x Sc x Sp x (PDD/100) x other |
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MU (using TMR)
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Presciribed dose
__________________________________ RDR x ISCF x Sc x Sp x TMRx other Sc= collimator size Sp and TMR= EFS |
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Electron MU
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Prescribed dose
_____________________________ (OP factor) x (cutout factor) x (PDD) OP factor= cone Cutout= cutout |
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Electron
90% line |
e
__ 4 |
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electron
80% line |
e
__ 3 |
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Electron
50 % line or standard |
e
_ 2 |
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average life
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1.44 (half life)
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theraputic ratio
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normal tissue tolerance
_________________________ tumor lethal dose |
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pounds to Kg
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1 Kg = 2.2 Pounds
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cerrobend to lead conversion
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1 cm of lead = 1.2 cm of cerrobend
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