Measurement of glucose consumption using [(18)F]fluorodeoxyglucose

Area of Science:

• Nuclear medicine
• Medical imaging
• Physiology

Background:

• Quantitative measurement of human glucose metabolism is crucial for understanding various physiological and pathological states.
• The [(18)F]fluorodeoxyglucose (FDG) method, a radiotracer technique, is widely used for this purpose.
• Accurate interpretation relies on understanding the underlying mathematical models and technical considerations.

Purpose of the Study:

• To provide a comprehensive review of the [(18)F]fluorodeoxyglucose (FDG) method for quantitative glucose metabolism measurement in humans.
• To describe the assumptions and mathematical formulation of the Sokoloff model and its adaptation for Positron Emission Tomography (PET).
• To discuss practical aspects, including different implementations, the influence of the lumped constant, and input function accuracy.

Main Methods:

• Review of the established Sokoloff model for quantitative autoradiography.
• Adaptation of the Sokoloff model for Positron Emission Tomography (PET) data analysis.
• Presentation of various implementations for estimating glucose consumption from PET-derived tissue activity.

Main Results:

• Detailed description of the mathematical framework for FDG-PET analysis.
• Discussion on the critical dependence of quantitative results on the "lumped constant" and input function accuracy.
• Presentation of different procedural approaches for conducting FDG studies.

Conclusions:

• The [(18)F]fluorodeoxyglucose (FDG) method, when applied with careful consideration of its underlying model and parameters, provides quantitative insights into human glucose metabolism.
• Accurate estimation of glucose consumption using PET necessitates precise determination of the input function and appropriate handling of the lumped constant.
• Recommendations are provided for optimizing the practical application of FDG studies for reliable quantitative assessment.