Chemical Exchange Saturation Transfer MRI: What Neuro-Oncology Clinicians Need To Know

Area of Science:

• Magnetic Resonance Imaging (MRI)
• Biomedical Engineering
• Radiology

Background:

• Chemical exchange saturation transfer (CEST) is an emerging MRI technique for measuring endogenous molecules with exchangeable protons.
• CEST is particularly relevant for neuro-oncology applications, such as amide proton transfer imaging.
• Advancements enable CEST on clinical scanners within practical acquisition times, facilitating clinical workflow integration.

Purpose of the Study:

• To review the fundamental physics and technical principles of CEST MRI.
• To explore the practical applications of CEST in neuro-oncology for clinicians.

Main Methods:

• Review of existing literature on CEST MRI physics and technology.
• Compilation of current and emerging neuro-oncology applications of CEST.
• Focus on information relevant to non-physicist clinicians.

Main Results:

• CEST MRI provides valuable in vivo contrast for specific endogenous molecules.
• The technique can be implemented on clinical MRI scanners efficiently.
• CEST applications in neuro-oncology often avoid gadolinium-based contrast agents.

Conclusions:

• CEST MRI is a promising technique for neuro-oncology, offering unique contrast mechanisms.
• Its feasibility on clinical scanners and avoidance of gadolinium contrast enhance its clinical utility.
• Clinicians should be aware of CEST principles and applications as it becomes more integrated into practice.