Tumor imaging using hyperpolarized 13C magnetic resonance spectroscopy

Area of Science:

• Biomedical Imaging
• Magnetic Resonance Spectroscopy
• Cancer Research

Background:

• Dynamic nuclear polarization (DNP) significantly boosts magnetic resonance imaging (MRI) and spectroscopy sensitivity, especially for low-gamma nuclei.
• This technique enables imaging of injected molecules and their metabolic products in biological systems.
• DNP is crucial for studying 13C-labeled metabolites in vivo.

Purpose of the Study:

• To review significant molecules investigated using DNP in preclinical cancer models.
• To highlight molecules that demonstrate in vivo metabolism or probe biological processes.
• To discuss imaging techniques and methods for extending hyperpolarized signal lifetime.

Main Methods:

• Application of DNP to 13C-labeled cell metabolites.
• In vivo imaging of molecular distribution and metabolic products.
• Review of pyruvate-lactate exchange catalyzed by lactate dehydrogenase.
• Discussion of imaging techniques and signal stabilization methods.

Main Results:

• Significant molecules investigated in preclinical cancer models were highlighted.
• The metabolism of hyperpolarized 13C-labeled pyruvate and its exchange with lactate were emphasized.
• Potential applications in cancer diagnosis and therapy monitoring were demonstrated.

Conclusions:

• Hyperpolarized MRI and magnetic resonance spectroscopic imaging show great promise for preclinical cancer imaging.
• The technique aids in cancer diagnosis and monitoring therapy response.
• Overcoming translation challenges to human imaging could revolutionize cancer patient management.