ESR/Alanine gamma-dosimetry in the 10-30 Gy range

Area of Science:

• Medical Physics
• Radiation Dosimetry
• Biophysics

Background:

• Accurate radiation dosimetry is crucial for medical applications, including blood irradiation.
• Electron spin resonance (ESR) using alanine is a potential method for measuring absorbed doses.
• Blood irradiation is a critical step in transfusion therapy to prevent transfusion-associated graft-versus-host disease.

Purpose of the Study:

• To prepare alanine dosimeters and establish an ESR/Dosimetry calibration curve for gamma irradiation.
• To measure the irradiation dose in gamma-irradiated human blood using the alanine/ESR method.
• To compare the accuracy and reliability of the alanine/ESR method with the established thermoluminescent dosimetry (TLD) method.

Main Methods:

• Preparation of alanine dosimeters for ESR analysis.
• Development of an ESR/Dosimetry calibration curve for gamma irradiation (10-30 Gy).
• Measurement of irradiation doses in human blood samples using the established calibration curve and comparison with TLD results.

Main Results:

• A reproducible calibration curve for alanine dosimetry was generated for gamma irradiation.
• The alanine/ESR method successfully measured irradiation doses in gamma-irradiated human blood.
• Results from the alanine/ESR method showed good agreement with the TLD method.

Conclusions:

• Alanine dosimetry with ESR is a viable method for measuring gamma irradiation doses in human blood.
• This technique can be reliably applied in blood transfusion therapy for dose verification.
• The alanine/ESR method presents a comparable alternative to TLD for relevant dosimetry applications.