Abstract #4010

Reducing the effects of under-sampling in images acquired with a 3D radial sequence for the purposes of real-time navigation.

Leah Morgan¹, Ernesta Meintjes¹, and Andre van der Kouwe^1,2

¹Division of Biomedical Engineering, Department of Human Biology, University of Cape Town, Cape Town, South Africa, ²Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA, United States

Radial sequences hold great potential for real-time navigation in MRI. Navigator images can be produced off very few spokes of sampled data however, characteristic streaking artifacts appear due to under-sampling at the outer edges of the k-space field of view. In this study, a method is proposed to reconstruct navigator images with a reduced base resolution to minimize the effects of under sampling and reduce the appearance of streaking artifacts, improving the accuracy of motion-registration. The success of this method supports the pursuit of radial sequences for applications in real-time navigation.

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.