Tc99mMAG3LabelingEfficiencyAnalyzer

Utility description: Tc-99m MAG3 Labeling Efficiency Analyzer

Tc-99m MAG3 Labeling Efficiency Analyzer — Tc-99m MAG3 Labeling Efficiency Analyzer

ℹ️  Utility controls quality of renal scintigraphy agent:
    • Radiochemical purity (>90%)
    • Free pertechnetate (<5%)
    • Hydrolyzed/colloidal Tc (<5%)
    • pH level

⚠️  CRITICAL: Impurities change biodistribution!
    Free Tc goes to thyroid, colloids go to liver.

Usage:
  Tc99mMAG3LabelingEfficiencyAnalyzer.exe                            → demo mode (console output)
  Tc99mMAG3LabelingEfficiencyAnalyzer.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,ProductName,Complex_Percent,Free_Tc_Percent,Hydrolyzed_Percent,pH,Incubation_Min,Activity_MBq,Min_RCP,Max_Free,Max_Hydro

Example:
  MAG3-2026-001,Tc-99m MAG3,96.5,2.0,1.5,7.4,10,740,90,5,5

— WHY IS THIS NEEDED?
Tc-99m MAG3 quality control is critical for kidney function diagnostics:
• MAG3 is excreted by renal tubules, providing high signal-to-background ratio
• Free $^{99m}TcO_4^-$ accumulates in thyroid, salivary glands and stomach, creating background
• Hydrolyzed reduced technetium (colloids) is taken up by liver and spleen RES
• This can mimic pathology or hide real accumulation defects in kidneys
• USP and Ph.Eur. require RCP of at least 90-95%

⚠️  CRITICAL:
• Radiochemical purity ≥90% (preferably ≥95%)
• Free pertechnetate ≤5%
• Colloidal impurities ≤5%
• pH must be neutral or slightly alkaline for complex stability

Key features:
• Separate control of two main impurity types (free and hydrolyzed)
• pH check as stability factor
• Compliance with USP <823> and Ph.Eur. standards
• Support for ITLC and HPLC data

Critical parameters:
• RCP: ≥90%
• Free Tc: ≤5%
• Hydrolyzed Tc: ≤5%

💡 Usage tips:
1. Use two different chromatographic systems to separate all three forms (e.g., acetone and saline)
2. Control incubation time (usually 10-15 minutes at room temperature)
3. Avoid air bubbles entering the kit (oxidation of $Sn^{2+}$)
4. Check $^{99}Mo/^{99m}Tc$ generator activity for molybdenum breakthrough
5. Use preparation within 6-8 hours after elution

⚠️ Note: MAG3 is more resistant to transchelation than DTPA, but more sensitive to reduction conditions than DMSA. The utility helps find balance between labeling efficiency and preparation stability.