Preparation of [⁶⁸Ga]GaCl₃ Using a Cyclotron

Area of Science:

• Nuclear Medicine
• Radiochemistry
• Cyclotron Production

Background:

• Growing clinical demand for ⁶⁸Ga-radiopharmaceuticals necessitates reliable production methods.
• Traditional ⁶⁸Ge/⁶⁸Ga generators face challenges in meeting this escalating demand.
• ⁶⁸Ga is a crucial radionuclide for Positron Emission Tomography (PET) imaging.

Purpose of the Study:

• To optimize the direct cyclotron production of ⁶⁸Ga.
• To establish a robust protocol for producing [⁶⁸Ga]GaCl₃ for radiopharmaceutical synthesis.
• To address the supply limitations of ⁶⁸Ga generators.

Main Methods:

• Direct production of ⁶⁸Ga via the ⁶⁸Zn(p,n)⁶⁸Ga reaction using a liquid target.
• Implementation on GE PETtrace instrumentation at the University of Michigan.
• Adherence to strict quality control criteria for clinical use.

Main Results:

• Successful optimization of cyclotron-based ⁶⁸Ga production.
• Achieved yields of 56 ± 4 mCi of [⁶⁸Ga]GaCl₃ (n=3).
• Produced [⁶⁸Ga]GaCl₃ meeting quality control standards for radiopharmaceutical preparation.

Conclusions:

• Cyclotron production provides a reliable and scalable source of ⁶⁸Ga.
• This optimized protocol ensures adequate [⁶⁸Ga]GaCl₃ for clinical radiopharmaceutical needs.
• Direct cyclotron production is a viable alternative to overcome generator-based supply issues.