Decay calculators
A simple set of online tools to calculate the decay over time of a given radioisotope.
These are not intended nor approved for clinical use.
Activity at specific times
Assay, residual and injection times
Decay after time
Starting from an initial activity, calculate the remaining radioactivity after a chosen delay (to find the activity at an earlier time, just use negative delay).
Current activity
Given time and initial activity, displays activity at current day and time
Equivalent Frame Time
Calculate frame time needed for a count equivalent scan delayed with respect to an original scan