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Journal of Nuclear Medicine

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Research ArticleHot Topics

Diagnostic Radiopharmaceutical Trial Design: Is It Time to Change Nomenclature?

Rodney J. Hicks
Journal of Nuclear Medicine June 2025, 66 (6) 848-850; DOI: https://doi.org/10.2967/jnumed.125.269496
Rodney J. Hicks
Department of Medicine, St Vincent’s Hospital, The University of Melbourne, Fitzroy, Victoria, Australia
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    TABLE 1.

    Matrix of Differences Between Drug and Radiopharmaceutical Development Trial Phases and Proposed Alternative Nomenclature

    Agent classNomenclaturePrimary aimSecondary aimEligibility
    DrugPhase ISafety (MTD)EfficacyNarrow
    RadiopharmaceuticalPhase A (acquisition optimization)Temporal profile of biodistributionRadiation dosimetry (safety)Broad
    DrugPhase IIEfficacyExpanded safety dataNarrow
    RadiopharmaceuticalPhase B (biologic relevance)Diagnostic performanceDefinition of target populationsBroad
    DrugPhase IIIComparison with SOCExpanded safety dataBroad
    RadiopharmaceuticalPhase C (clinical applicability)Impact on management after SOCIncremental diagnostic informationNarrow
    • MTD = maximum tolerated dose; SOC = standard of care.

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Journal of Nuclear Medicine: 66 (6)
Journal of Nuclear Medicine
Vol. 66, Issue 6
June 1, 2025
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Diagnostic Radiopharmaceutical Trial Design: Is It Time to Change Nomenclature?
Rodney J. Hicks
Journal of Nuclear Medicine Jun 2025, 66 (6) 848-850; DOI: 10.2967/jnumed.125.269496

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Diagnostic Radiopharmaceutical Trial Design: Is It Time to Change Nomenclature?
Rodney J. Hicks
Journal of Nuclear Medicine Jun 2025, 66 (6) 848-850; DOI: 10.2967/jnumed.125.269496
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