Slice-selective gradient-encoded CEST spectroscopy for monitoring dynamic parameters and high-throughput sample...

Area of Science:

• Magnetic Resonance Imaging
• Biomedical Engineering
• Chemical Biology

Background:

• Chemical Exchange Saturation Transfer (CEST) NMR is vital for molecule-specific contrast.
• Characterizing CEST agents requires resolving spectral dimensions via z-spectra.
• Conventional z-spectra acquisition is time-consuming due to point-by-point recording.

Purpose of the Study:

• To accelerate the acquisition of z-spectra for CEST NMR.
• To enable monitoring of dynamic processes like rapid temperature changes.
• To facilitate high-throughput screening of CEST contrast agents.

Main Methods:

• Employed gradient-encoding to accelerate z-spectra acquisition.
• Reduced acquisition time to only two scans in phantom experiments.
• Combined gradient-encoding with multi-slice selection for spatial dimension use.

Main Results:

• Substantially accelerated z-spectra acquisition process.
• Enabled monitoring of dynamic processes in PARACEST samples.
• Allowed simultaneous investigation of heterogeneous samples using multi-slice selection.

Conclusions:

• Gradient-encoded CEST significantly reduces acquisition times.
• This technique allows for the study of dynamic processes previously inaccessible.
• Gradient-encoded CEST is valuable for high-throughput screening of CEST agents.