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[Technetium polyphosphate and technetium diphosphonate. A comparative study].

W Henne, H U Pixberg, P Pfannenstiel

    Nuclear-Medizin
    |June 30, 1975
    PubMed
    Summary
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    99mTc-ethane-1-hydroxy-1,1-diphosphonate (EHDP) shows superior stability and blood clearance compared to 99mTc-polyphosphate (Poly-P) for bone imaging. This results in reduced background activity, improving scan quality.

    Area of Science:

    • Nuclear medicine
    • Radiopharmacology

    Background:

    • 99mTc-labelled phosphates are standard bone-seeking agents.
    • Evaluating new agents is crucial for improving diagnostic imaging.

    Purpose of the Study:

    • To compare the in vitro stability and in vivo performance of 99mTc-polyphosphate (Poly-P) and 99mTc-ethane-1-hydroxy-1,1-diphosphonate (EHDP).

    Main Methods:

    • In vitro stability assessment of Poly-P and EHDP post-preparation.
    • In vivo evaluation of blood clearance and renal excretion in patients.

    Main Results:

    • EHDP demonstrated superior in vitro stability within the initial two hours.
    • EHDP exhibited better blood clearance than Poly-P, leading to lower background activity.
    • No significant differences in renal excretion were observed between the two agents over a 4-hour period.

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    Conclusions:

    • 99mTc-ethane-1-hydroxy-1,1-diphosphonate (EHDP) offers advantages over 99mTc-polyphosphate (Poly-P) for bone scintigraphy.
    • Improved stability and blood clearance of EHDP enhance diagnostic image quality by reducing background interference.