Diffusion Measurements - DWI

The following diffusions measurements were aquired using a DWI sequence referring to the following two publications:

Sequences for Diffusion MRI
Jim Pipe, Ph.D., St. Joseph’s Hospital, Phoenix, Arizona, USA
https://afni.nimh.nih.gov/sscc/staff/rwcox/ISMRM_2006/Syllabus%202006%20-%203340/files/E_04.pdf

The Stejskal–Tanner equation generalized for any gradient shape - an overview of most pulse sequences measuring free diffusion
Davy Sinnaeve - Department of Organic Chemistry, Ghent University, Belgium
http://onlinelibrary.wiley.com/doi/10.1002/cmr.a.21223/abstract

The figure below shows the used sequence programmed in the openMATLAB interface. The DWI sequence can be configured to use multiple diffusion and imaging modules in 0D / 1D and 2D.

DWI_Sequence_Plot.png

As a demonstration we measured the ADC values of a selection of oils: rapeseed oil, olive oil and sewing machine oil. This is shown in the left figure.
The ADC values of a combined sample of ethanol and water is shown in the right figure.

DWI_Oil DWI_Water
DWI results - Rapeseed oil, olive oil, sewing machine oil DWI results - Water, Ethanol