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NM
Radionuclide Planner
Properties
Decay
Dose
Custom
🌙
Decay Calculator
A(t) = A₀ · e
−λt
| λ = ln(2) / T½
⚙ Parameters
Radionuclide
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Initial Activity A₀
MBq
GBq
mCi
Ci
kBq
Reference date & time
Target date & time
(optional)
— or — Elapsed time
h
min
d
s
Overrides date/time fields when filled
Target Activity A
target
(optional)
MBq
GBq
mCi
kBq
Calculates time to reach this activity
Vial / container weight
(optional)
g
kg
For clearance check (RD 1217/2024 Annex IV Table A.1)
Calculate
📊 Results
♿ Clearance assessment — RD 1217/2024, Annex IV Table A.1
Decay Curve
Activity at selected time points
⭳ Export CSV
Time
Elapsed (h)
Activity (MBq)
Activity (mCi)
Fraction remaining