Meeting Banner
Abstract #2610

Spatiotemporal maps for dynamic MRI reconstruction: a proof-of-principle demonstration on single-coil animal gastrointestinal data

Rodrigo A. Lobos1, Xiaokai Wang1, Zhongming Liu1, Jeffrey A. Fessler2, and Douglas C. Noll1
1Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States, 2Electrical and Computer Engineering, University of Michigan, Ann Arbor, MI, United States

Synopsis

Keywords: Image Reconstruction, Image Reconstruction, Dynamic MRI reconstruction

Motivation: Partially separable functions (PSF) are commonly used in dynamic MRI to model the signal in the (x,t)-space; however, the number of components in the PSF expansion can be restrictive in applications where voxels present different temporal/spectral characteristics (e.g., gastrointestinal MRI reconstruction).

Goal(s): To propose a parsimonious representation for the dynamic MRI signal, called spatiotemporal maps (STM).

Approach: STM are derived by proving that shift-invariant linear predictability relationships can exist across the k-spaces of multiple time-frames.

Results: STM provide a parsimonious representation for the spatiotemporal MRI signal; they can be efficiently calculated from autocalibration data; and they can be synergistically combined with modern regularizers.

Impact: Spatiotemporal maps provide a parsimonious voxel-dependent expansion for the dynamic MRI signal, even when voxels present various temporal/spectral characteristics. They can be efficiently calculated from autocalibration data, and can be synergistically combined with modern regularizers to reconstruct highly accelerated data.

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.

Keywords