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99mTc-diethyl-HIDA: a contribution to the study of its structure
European Journal of Nuclear Medicine
|April 1, 1978
Summary
Technetium-99m-diethyl-IDA (99mTc-diethyl-HIDA) separates into two components after reconstitution. These components, likely mono- and biscomplexes, show similar biological distribution in mice.
Area of Science:
- Nuclear medicine
- Radiopharmaceutical chemistry
Background:
- 99mTc-diethyl-HIDA (Solco HIDA) is a radiopharmaceutical used in medical imaging.
- Understanding its composition and stability is crucial for accurate diagnostic applications.
Purpose of the Study:
- To investigate the composition of 99mTc-diethyl-HIDA after reconstitution.
- To identify the chemical forms of the radiopharmaceutical and their stability over time.
Main Methods:
- Sephadex column chromatography was employed to separate the components of 99mTc-diethyl-HIDA.
- The stability and interconversion of the separated components were monitored post-reconstitution.
Main Results:
- 99mTc-diethyl-HIDA consists of two separable components following reconstitution with pertechnetate.
- One component appears to be an intermediate that converts to the other within two hours.
- The components are hypothesized to be mono- and biscomplexes of N-(2,6-diethyl-acetanilid)-imino diacetic acid with technetium.
Conclusions:
- The study characterizes the radiochemical composition of 99mTc-diethyl-HIDA.
- The identified components exhibit similar biological distribution in animal models, suggesting comparable in vivo behavior.