Abstract #4816

Motion-robust dynamic abdominal MRI using k-t GRASP and dynamic dual-channel training of super-resolution U-Net (DDoS-UNet)

Chompunuch Sarasaen^1,2,3, Soumick Chatterjee^1,3,4,5, Georg Rose^2,3, Andreas Nürnberger^4,5,6, and Oliver Speck^1,3,6,7,8

¹Biomedical Magnetic Resonance, Otto von Guericke University, Magdeburg, Germany, ²Institute for Medical Engineering, Otto von Guericke University, Magdeburg, Germany, ³Research Campus STIMULATE, Otto von Guericke University, Magdeburg, Germany, ⁴Data and Knowledge Engineering Group, Otto von Guericke University, Magdeburg, Germany, ⁵Faculty of Computer Science, Otto von Guericke University, Magdeburg, Germany, ⁶German Center for Neurodegenerative Disease, Magdeburg, Germany, ⁷Center for Behavioral Brain Sciences, Magdeburg, Germany, ⁸Leibniz Institute for Neurobiology, Magdeburg, Germany

Synopsis

Cartesian sampling techniques are available to speed up the measurement of dynamic MRI, such as k-t GRAPPA. However, radial samplings, such as iGRASP, are more robust to motion and can be applied for abdominal dynamic MRI. In this work, k-t GRAPPA inspired iGRASP has been created (so-called k-t GRASP)–which acquires the subsequent time points by starting the initial spoke of the time point with an angle with the last spoke of the previous time point, and extended by super-resolution reconstruction of dynamic abdominal MRI using DDoS-UNet. The method was evaluated in 3D dynamic data of four subjects with retrospective undersampling.

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.