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Updated: May 1, 2026

Blood Flow Imaging with Ultrafast Doppler

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

Ultrafast CEST imaging.

Jörg Döpfert¹, Moritz Zaiss², Christopher Witte¹

¹Leibniz-Institut für Molekulare Pharmakologie, Robert-Rössle-Str. 10, 13125 Berlin, Germany.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)

|April 12, 2014

Summary

This summary is machine-generated.

This study introduces a novel MR imaging method for fast chemical exchange saturation transfer (CEST) contrast agent screening. The technique enables rapid, simultaneous multi-compound analysis, significantly accelerating imaging times.

Keywords:

Chemical exchange High-throughput screening PARACEST agents Ultrafast CEST imaging

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Area of Science:

Magnetic Resonance Imaging
Biomedical Engineering
Chemical Exchange Saturation Transfer (CEST)

Background:

Conventional CEST imaging is time-consuming, limiting its clinical application.
Characterizing CEST contrast agents requires efficient and rapid imaging techniques.
Ultrafast spectroscopy methods exist but lack imaging capabilities.

Purpose of the Study:

To develop a novel MR imaging method for rapid characterization and screening of CEST contrast agents.
To enable simultaneous investigation of multiple compounds.
To overcome the speed limitations of conventional CEST imaging.

Main Methods:

Encoding the chemical shift dimension with an additional gradient, extending ultrafast CEST spectroscopy.
Employing radial subsampling with a fast multislice readout (10 projections/image, 128x128 matrix).
Utilizing a heuristic reconstruction algorithm with low rank and limited object support priors.

Main Results:

Simultaneous multi-compound analysis with arbitrary sample tube arrangement achieved.
Acquisition of spectral CEST datasets with 15 saturation offsets.
Achieved imaging speeds over 16 times faster than conventional CEST imaging.

Conclusions:

The developed MR imaging method significantly accelerates CEST contrast agent screening.
This technique offers a powerful tool for rapid characterization of multiple CEST agents simultaneously.
The method holds promise for improving the efficiency of developing novel CEST-based imaging agents.