Hyperpolarized Carbon (¹³C) MRI of the Kidneys: Basic Concept

Area of Science:

• Medical Imaging
• Biochemistry
• Nephrology

Background:

• Current clinical markers for renal disease are insufficient.
• Hyperpolarized (HP) 13C MRI, utilizing dissolution dynamic nuclear polarization (DNP), offers novel imaging capabilities for the kidneys.
• This technology addresses limitations in assessing kidney structure, function, and metabolism.

Purpose of the Study:

• To introduce the concept of HP 13C MRI for renal applications.
• To review relevant probes and their applications in renal disease.
• To highlight the potential of HP 13C MRI in diagnosing and monitoring kidney conditions.

Main Methods:

• Utilizing [13C]urea, a metabolically inert tracer, to evaluate kidney structure and function.
• Employing [1-13C]pyruvate and other small molecules to assess metabolic changes.
• Leveraging dissolution dynamic nuclear polarization (DNP) for hyperpolarized 13C MRI.

Main Results:

• Preclinical studies demonstrate significant potential for HP 13C MRI in monitoring renal disease.
• [13C]urea allows for structural and functional assessment.
• [1-13C]pyruvate and other probes enable metabolic profiling.

Conclusions:

• HP 13C MRI is a promising tool for advancing renal disease diagnostics and monitoring.
• The technique has potential applications in kidney cancer, diabetic nephropathy, and ischemic kidney injury.
• Further research is needed to translate these findings into clinical practice.