Rubidium82ChlorideQualityChecker

Utility description: Rubidium-82 Chloride

Rubidium-82 Chloride Quality Checker — Rubidium-82 Chloride for Myocardial PET Perfusion

ℹ️  Utility checks critical parameters of Sr-82/Rb-82 generator eluate:
    • Strontium-82 breakthrough (≤20 Bq/MBq Rb-82) — CRITICAL!
    • Strontium-85 breakthrough (≤500 Bq/MBq Rb-82)
    • Radiochemical purity (≥95%)
    • pH, appearance, endotoxins, sterility

⚠️  CRITICAL: Strontium-82 breakthrough (T½=25 days) leads to bone accumulation and bone marrow irradiation!
    Generator must be immediately taken out of service if breakthrough limits are exceeded.

Usage:
  Rubidium82ChlorideQualityChecker.exe                            → demo mode (console output)
  Rubidium82ChlorideQualityChecker.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,ElutedActivityMBq,BreakthroughSr82BqPerMBq,BreakthroughSr85BqPerMBq,RadiochemicalPurityPercent,pH,AppearanceClarity,SterilityTest,EndotoxinsEU,SalineVolumeMl,GeneratorID

Example (appearance: 0=clear, 1=cloudy):
  RUBID-ELUTE-2026-001,1500.0,0.5,5.0,99.5,5.5,0,0,10.0,50.0,GEN-SR82-XYZ-099

Supported product types:
• Generator Eluate — Sr-82/Rb-82 generator eluate for myocardial PET perfusion

— WHY IS THIS NEEDED?
Rubidium-82 (T½=75 seconds) is an ideal radiopharmaceutical for myocardial perfusion assessment using PET:
• Allows rapid studies without an on-site cyclotron (generator system)
• High image quality due to positron decay
• Short half-life reduces patient dose after procedure completion
• Used for diagnosis of coronary artery disease, myocardial viability assessment

⚠️  CRITICAL:
• Strontium-82 (Sr-82) breakthrough ≤20 Bq per 1 MBq Rb-82 — Sr-82 is the parent isotope with a 25-day half-life. If it enters the patient's body, it accumulates in bone tissue (like calcium) and creates significant radiation burden to red bone marrow for a long time. This is the MAIN safety parameter of the generator.
• Strontium-85 (Sr-85) breakthrough ≤500 Bq per 1 MBq Rb-82 — Sr-85 (T½=65 days) is also a production impurity of Sr-82. Although less dangerous than Sr-82, its accumulation is also undesirable.
• Radiochemical purity ≥95% — Rubidium must be in chloride form (Rb+ ion), which is a potassium analog and is taken up by myocytes via Na+/K+-ATPase.
• pH 4.0–8.0 — for safe intravenous administration.
• Appearance: Clear, colorless solution, free of particles.
• Endotoxins ≤175 EU/dose — standard for injectables.
• Sterility — MANDATORY.

Key features:
• Strict control of parent isotope breakthrough (Sr-82, Sr-85) according to USP <823>
• Assessment of eluate suitability for clinical use
• Generator status monitoring (high breakthrough signals need for generator replacement)

Critical parameters:
• Sr-82 breakthrough: ≤20 Bq/MBq Rb-82 (0.02 kBq/MBq)
• Sr-85 breakthrough: ≤500 Bq/MBq Rb-82 (0.5 kBq/MBq)
• Radiochemical purity: ≥95.0%
• pH: 4.0–8.0
• Appearance: Clear, particle-free
• Endotoxins: ≤175 EU/vial
• Sterility: no microbial growth

💡 Usage tips:
1. Strontium breakthrough test is performed regularly (daily or before first elution of the day) using a dose calibrator with ionization chamber and lead shield (Sr-82 emits gamma radiation, Rb-82 mainly positrons/annihilation gammas, but method requires specific equipment or chromatography).
2. If Sr-82 breakthrough exceeds limit, generator must be immediately taken out of service and disposed of as radioactive waste.
3. Due to short half-life of Rb-82, all tests except strontium breakthrough and appearance are often retrospective or controlled by manufacturing process (sterility, endotoxins).
4. Eluate is administered immediately after elution, as activity decays rapidly.

⚠️ Note: Unlike other radiopharmaceuticals, Rb-82 quality directly depends on generator column integrity. Strontium breakthrough is not just an impurity, but a sign of separation system failure, making use of such generator dangerous for patient life due to leukemia risk (bone marrow irradiation).