Transfer standard for beta decay radionuclides in radiotherapy

Area of Science:

• Nuclear medicine
• Radiopharmaceutical therapy
• Metrology

Background:

• Accurate activity measurement of radiopharmaceuticals is crucial for patient safety and effective therapeutic outcomes.
• Radionuclide calibrators are standard tools, but measuring pure beta-emitters presents significant challenges due to high-energy beta radiation.
• Existing calibration methods for pure beta-emitters can be complex and prone to geometric uncertainties.

Purpose of the Study:

• To address the complexities in accurately measuring pure beta-emitter radiopharmaceuticals.
• To report the development and application of a novel 90Sr/90Y transfer standard for improved calibration.
• To simulate and account for geometric effects inherent in high-energy beta radiation measurements.

Main Methods:

• Utilized a primary calibration with a Yttrium-90 (90Y) reference solution.
• Employed a strontium-90/yttrium-90 (90Sr/90Y) transfer standard in conjunction with a solid source.
• Simulated geometric effects characteristic of high-energy beta radiation to validate the measurement approach.

Main Results:

• Demonstrated a viable method for overcoming calibration challenges with pure beta-emitters.
• The developed 90Sr/90Y transfer standard effectively simulates geometric effects.
• Achieved more accurate activity measurements compared to conventional methods for pure beta-emitters.

Conclusions:

• The newly developed 90Sr/90Y transfer standard offers a practical solution for accurate radiopharmaceutical activity calibration.
• This method enhances the reliability of therapeutic radiopharmaceutical measurements, particularly for pure beta-emitters.
• Improved calibration accuracy contributes to safer and more effective patient administration of radiopharmaceuticals.