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biodex ATOMLAB 960 - Thyroid Uptake and MDA Formulas

biodex ATOMLAB 960
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F-2 APPENDIX G Biodex Medical Systems, Inc. © 2014
Thyroid Uptake
There are several methods that can be used in the Atomlab 960
a) Thyroid Uptake when recounting a standard
Uptake % =
!"#$%&'!!"#!!"#$%&#!!"#$%!!"#
!"#$%&'"(!!"#$%#&%!!"#!!"#$%&'()*
x 100
b) Thyroid Uptake with decay correction of the dose
Uptake % =
!"#$%&'!!"#!!"#$%&#!!"#$%!!"#
!"#$%!!"##$%&$'!(!"#$!!"#$%!!"#!!"#$%&'()*)
x 100
c) Thyroid Uptake for therapy doses
i. Count in a dose calibrator the standard
ii. Count in a dose calibrator the therapy dose
Dose Multiplier =
!"#$%&'!!"#$!!"#$%$#&
!"#$%#&%!!"#$!!"#$%$#&
= Multiplier
Uptake % =
!"#$%&#!!"#$%&'!!"#$% !!!"#$%&#!!"#$%!!"#$%)
!"#$%!!"##$%&$'!( !"#$%#&%!!"#$!!"#$%$#&!!"#!!"#$% !! !(!"#$%&#%'()
x 100
Uptake % =
!"#!!"#$%&#!!"#$%&'!!"#$%
!"#$%!!"##$%&$'!(!"#!!"#$%#&%!!"#$%$#&!!!!"#$%&#%'()
x 100
d) Alternate therapy Calculation
i) Total cpm =
!"#$%&#!!"#$!!"#!
!"#$%#&%!!"#!
x Standard (Net) cpm
NOTE: Measure Dose then measure Standard in a Dose Calibrator
NOTE: Standard (Net) cpm is counted when counting patient’s thyroid
ii) Uptake % =
!"#$%&#!!"#$%&'! !"# !"#
!"#$%!!"#
x 100

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