TABLE 1

Properties of Ideal Diagnostic Radiopharmaceutical for Imaging

PropertiesNotes
1. Easy availabilityBe readily available at low cost
2. Particle emissionDiagnostic purpose: be a pure γ-emitter—that is, have no particle emission such as α and β because these contribute radiation dose to patient without providing diagnostic information
Therapeutic purpose: have particle emission such as α and β because these are useful for damaging abnormal cells
3. High target–to–nontarget activity ratioProvide maximum efficacy in diagnosis (therapy), and minimize radiation dose to patient
4. Proper metabolic activityPossess proper metabolic activity—that is, follow or be trapped in metabolic process of interest