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Rhenium-188 Hydroxyethane 1,1-Diphosphonic Acid (HEDP) for Bone Pain Palliation Using BARC-HEDP Kits versus Pars-HEDP
Radhakrishnan Edathuruthy Kalarickal Ramakurup1, Viju Chirayil2, Arun Pandiyan1
1Kovai Medical Centre and Hospital, Coimbatore, Tamil Nadu, India.
Summary
Indigenous BARC kits and imported Pars kits both effectively prepare Rhenium-188 hydroxyethane 1,1-diphosphonic acid (HEDP) radiopharmaceuticals. The BARC kit offers greater flexibility in handling lower concentrations of Rhenium-188 perrhenate.
Area of Science:
- Nuclear medicine
- Radiopharmaceutical chemistry
Background:
- Rhenium-188 hydroxyethane 1,1-diphosphonic acid (HEDP) is a key radiopharmaceutical for palliative bone pain treatment.
- Freeze-dried kits simplify the preparation of Rhenium-188 HEDP.
Purpose of the Study:
- To compare the radiochemistry of indigenous BARC-HEDP kits with commercially available Pars-HEDP kits.
- Evaluate the performance of Rhenium-188 HEDP prepared from both kit sources.
Main Methods:
- Preparation of Rhenium-188 HEDP using freeze-dried kits from BARC and Pars Isotope Company.
- Utilized freshly eluted Rhenium-188 sodium perrhenate from a Tungsten-188/Rhenium-188 generator.
Main Results:
- Both BARC and Pars HEDP kits yielded Rhenium-188 HEDP with >95% radiochemical purity.
- Comparable in vitro stability and pharmacokinetic properties were observed for Rhenium-188 HEDP from both kits.
- Bone-to-soft tissue ratios were 1.993 for BARC-HEDP and 1.416 for Pars-HEDP.
Conclusions:
- Both HEDP kits offer user-friendly preparation of Rhenium-188 HEDP.
- The BARC-HEDP kit allows larger elution volumes, accommodating lower activity concentrations.
- Indigenous product availability is advantageous.
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