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Abstract #0014

Continuous Table Movement MRI in a Single Breath-Hold: Highly Undersampled Radial Acquisitions with Nonlinear Iterative Reconstruction & Joint Coil Estimation

Michael O. Zenge1, Martin Uecker2, 3, Gerald Mattauch1, Jens Frahm2

1Healthcare Sector, Siemens AG, Erlangen, Germany; 2Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut fr biophysikalische Chemie, Gttingen, Germany; 3Electrical Engineering and Computer Science, University of California, Berkeley, United States

Continuous table movement MRI is an emerging technique for a variety of clinical applications. The achievable acceleration with parallel imaging, however, is not yet sufficient to scan an extended FOV in a single breath-hold. Radial scanning in combination with innovative iterative image reconstruction and joint coil estimation promises significantly higher acceleration factors. This method was implemented for moving table abdominal MRI in a single breath-hold and was evaluated in 5 healthy volunteers. It was proven that highly undersampled radial images can be reconstructed with very little streaking artifacts which justifies further investigation in volunteers and patients.

Keywords

abdominal accelerating acceleration achieve achieved acquisition acquisitions advantages allow allows almost although analogy anterior apart application applied array artifacts available body breath broad calculation challenge channel clinical close coil coils combination concept conditions consecutive conservatively constant continuous continuously coronal deals degradation depending described determined dimensional directly echoes efficiency electrical elements emerging engineering establish estimation exploits extended features featuring filter furthermore gradient hardware healthy highly hold implementations in vivo included informed innovative integrated investigation iterative joint latter magnet martin matrix median moreover movement moving neighboring nevertheless nonlinear optimum orientation overlap parallel particular patients physical position practice precise problems profiles promises proposed quality radial rapid receive reception reconstruction reduction reformats regularization regularized represents requirements residual resolution scanning seamless seamlessly sector seems select selecting sensitivities sensitivity setting setup severe short significantly slice slices software spokes streaking subset succeeded successfully sufficient support suppress suppresses suppression surface table throughout took trans transverse unique uniquely variety volume volunteers written