Radiopharmaceutical Dispensing Planner

This tool calculates the required volume to dispense a specified activity of a radiopharmaceutical at a given time, accounting for radioactive decay.

Radioisotope: Tc-99m I-131 F-18 Ga-68 Lu-177

Activity (mCi):

Volume (ml):

Preparation Date and Time:

Required Date and Time:

Required Activity (mCi):

Required Volume: ml

How It Works

This calculator helps determine the required volume of a radiopharmaceutical based on its activity and the time elapsed since preparation, accounting for radioactive decay.

1. Select the Radioisotope: Choose the isotope from the dropdown menu.
2. Input Activity and Volume: Enter the initial activity (mCi) and volume (ml) of the prepared radiopharmaceutical.
3. Preparation Date and Time: Specify when the radiopharmaceutical was prepared.
4. Required Date and Time: Specify the time at which the activity is required.
5. Required Activity: Enter the desired activity (mCi) to dispense.
6. Calculation: Upon clicking "Calculate," the following occurs:
   • Retrieve half-life of the selected isotope.
   • Calculate decay constant: λ = ln(2) / t_1/2.
   • Calculate time difference between preparation time and required time.
   • Determine initial concentration: C₀ = A₀ / V.
   • Calculate decay-corrected concentration: C = C₀ * e^-λt.
   • Calculate required volume: V_req = A_req / C.
7. Results: The required volume is displayed. If the decay-corrected concentration is zero or negative, the required volume is infinite, indicating the radiopharmaceutical is no longer viable.

This tool is for educational purposes only.

Made by Poovendhan.