Abstract #1622

Effects of T2*-blurring on effective resolution of diffusion MRI with spiral and EPI readout trajectories at 7T

Sajjad Feizollah^1,2 and Christine L. Tardif^1,2,3

¹Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada, ²McConnell Brain Imaging Center, Montreal Neurological Institute, McGill University, Montreal, QC, Canada, ³Department of Biomedical Engineering, McGill University, Montreal, QC, Canada

Synopsis

Several strategies have been used to increase the SNR of diffusion-weighted imaging including the use of partial Fourier EPI and spiral trajectories. Although these methods increase the SNR and sequence efficiency significantly, they affect the image quality and resulting diffusion measures causing loss of microstructural information of fine structures. Blurring caused by the T2* decay is one of the important effects resulting in low effective resolutions. Shorter T2* at ultra-high magnetic fields reduces the effective resolution in spite of providing higher SNR. This study shows about 60% lower effective resolution than the nominal resolution using PF-EPI and spiral at 7T.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.