Essays about: "Radial Sampling Pattern"

Found 2 essays containing the words Radial Sampling Pattern.

1. 1. In-Plane Motion Correction in Reconstruction of non-Cartesian 3D-functional MRI

   University essay from Datorseende; Tekniska högskolan

   Author : Anette Karlsson; [2011]
   Keywords : MRI; fMRI; PRESTO-CAN; Motion Correction; Radial Sampling Pattern; Fourier domain; Circular Correlation; Gridding Reconstruction;

   Abstract : When patients move during an MRI examination, severe artifacts arise in the reconstructed image and motion correction is therefore often desired. An in-plane motion correction algorithm suitable for PRESTO-CAN, a new 3D functional MRI method where sampling of k-space is radial in kx-direction and kz-direction and Cartesian in ky-direction, was implemented in this thesis work. READ MORE

3. 2. Improved Temporal Resolution Using Parallel Imaging in Radial-Cartesian 3D functional MRI

   University essay from Datorseende

   Author : Gustav Ahlman; [2011]
   Keywords : fMRI; PRESTO-CAN; SENSE; parallel imaging; temporal resolution; radial-Cartesian sampling; normalized convolution;

   Abstract : MRI (Magnetic Resonance Imaging) is a medical imaging method that uses magnetic fields in order to retrieve images of the human body. This thesis revolves around a novel acquisition method of 3D fMRI (functional Magnetic Resonance Imaging) called PRESTO-CAN that uses a radial pattern in order to sample the (kx,kz)-plane of k-space (the frequency domain), and a Cartesian sample pattern in the ky-direction. READ MORE