A kit for labelling erythrocytes or leukocytes with technetium-99m

Area of Science:

• Nuclear Medicine
• Radiopharmacy
• Biomedical Imaging

Background:

• Erythrocyte labeling with technetium-99m (99mTc) is crucial for various diagnostic imaging procedures.
• Existing labeling methods can be time-consuming or require larger injection volumes.
• The development of efficient and cost-effective labeling kits is an ongoing area of research.

Purpose of the Study:

• To develop and evaluate a novel in vitro pretinning method for labeling erythrocytes using technetium-99m (99mTc).
• To assess the labeling efficiency and clinical equivalence of the new method compared to established techniques.
• To highlight the versatility and cost-effectiveness of the developed labeling kit.

Main Methods:

• Development of a kit containing stannous chloride stabilized with gentisic acid for erythrocyte labeling.
• In vitro labeling of erythrocytes with technetium-99m (99mTc) using the developed kit.
• Evaluation of labeling efficiency and comparison of clinical results with the Brookhaven kit and HMPAO-labeled leukocytes.

Main Results:

• Achieved a high labeling efficiency of 97.3% (SD 1.4%) in a study involving 80 patients.
• The new method demonstrated reduced preparation time and a smaller reinjection volume compared to the Brookhaven kit.
• Clinical results were found to be equivalent to those obtained with the Brookhaven kit.

Conclusions:

• The gentisic acid-stabilized stannous chloride kit provides a versatile, cost-effective, and efficient method for 99mTc-labeled erythrocyte preparation.
• The kit's efficacy in labeling both erythrocytes and leukocytes (as previously shown) underscores its broad applicability in nuclear medicine.
• This optimized labeling technique offers practical advantages for clinical nuclear medicine imaging.