Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Chris A. Cocosco"'
Autor:
Klaas P. Pruessmann, Maxim Zaitsev, Chris A. Cocosco, Anna Welz, Christoph Barmet, Juergen Hennig, Daniel Gallichan, Frederik Testud, Andrew Dewdney, Kelvin J. Layton
Publikováno v:
Magnetic Resonance in Medicine. 73:1340-1357
PurposePatLoc (Parallel Imaging Technique using Localized Gradients) accelerates imaging and introduces a resolution variation across the field-of-view. Higher-dimensional encoding employs more spatial encoding magnetic fields (SEMs) than the corresp
Autor:
Andrew Dewdney, Juergen Hennig, Heinrich Lehr, Hans Post, Zhenyu Liu, Daniel Gallichan, Feng Jia, Frederik Testud, Jan G. Korvink, Hartmut Schmidt, Anna Welz, Walter R Witschey, Maxim Zaitsev, Chris A. Cocosco, Gerrit Schultz, Hans Weber
Publikováno v:
Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering. 43:111-125
A cylindrical head gradient insert for human imaging with non-linear spatial encoding magnetic fields (SEMs) has been designed, optimized and successfully integrated with a modified 3T clinical MR system. This PatLoc (parallel acquisition technique u
Autor:
Chris A. Cocosco, Hans Weber, Walter R Witschey, Sebastian Littin, Maxim Zaitsev, Anna Welz, Daniel Gallichan, Gerrit Schultz, Juergen Hennig
Publikováno v:
Magnetic Resonance in Medicine. 71:57-66
Heterogeneity of the static magnetic field in magnetic resonance imaging may cause image artifacts and degradation in image quality. The field heterogeneity can be reduced by dynamically adjusting shim fields or dynamic shim updating, in which magnet
Autor:
Maxim Zaitsev, Frederik Testud, Klaas P. Pruessmann, Chris A. Cocosco, Jürgen Hennig, Christoph Barmet, Daniel Gallichan, Anna Welz, Kelvin J. Layton
Publikováno v:
Magnetic Resonance in Medicine. 70:684-696
It has recently been demonstrated that nonlinear encoding fields result in a spatially varying resolution. This work develops an automated procedure to design single-shot trajectories that create a local resolution improvement in a region of interest
Autor:
Daniel Gallichan, Chris A. Cocosco, Gerrit Schultz, Wilfried Reichardt, Maxim Zaitsev, Jürgen Hennig, Hans Weber, Anna Welz, Sebastian Littin, Walter R Witschey
Publikováno v:
Magnetic Resonance in Medicine. 69:1317-1325
In this work, the concept of excitation and geometrically matched local in-plane encoding of curved slices (ExLoc) is introduced. ExLoc is based on a set of locally near-orthogonal spatial encoding magnetic fields, thus maintaining a local rectangula
Autor:
Daniel Gallichan, Maxim Zaitsev, Juergen Hennig, Anna Welz, Hans Weber, Chris A. Cocosco, Gerrit Schultz
Publikováno v:
Magnetic Resonance Materials in Physics, Biology and Medicine. 25:419-431
Object: This work seeks to examine practical aspects of in vivo imaging when spatial encoding is performed with three or more encoding channels for a 2D image. Materials and methods: The recently developed 4-Dimensional Radial In/Out (4D-RIO) traject
Autor:
Chris A. Cocosco, Jürgen Hennig, Hans Weber, Gerrit Schultz, Anna Welz, Maxim Zaitsev, Daniel Gallichan, Walter R Witschey
Publikováno v:
IEEE Transactions on Medical Imaging. 30:2134-2145
We present reconstruction methods for radial magnetic resonance imaging (MRI) data which were spatially encoded using a pair of orthogonal multipolar magnetic fields for in-plane encoding and parallel imaging. It is shown that a direct method exists
Autor:
Anna Welz, Gerrit Schultz, Daniel Gallichan, Walter R Witschey, Maxim Zaitsev, Chris A. Cocosco, Jürgen Hennig, Hans Weber
Publikováno v:
Magnetic Resonance in Medicine. 67:1620-1632
A technique is described to localize MR signals from a target volume using nonlinear pulsed magnetic fields and spatial encoding trajectories designed using local k-space theory. The concept of local k-space is outlined theoretically, and this princi
Autor:
Max A. Viergever, Wiro J. Niessen, Evert-Jan Vonken, Chris A. Cocosco, Thomas Netsch, Gunnar K. Lund, Alexander Stork
Publikováno v:
Journal of Magnetic Resonance Imaging, 28(2), 366-374. John Wiley & Sons Inc.
3Purpose: To propose and to evaluate a novel method for theautomatic segmentation of the heart’s two ventricles fromdynamic (“cine”) short-axis “steady state free precession”(SSFP) MR images. This segmentation task is of significantclinica
Autor:
Wiro J. Niessen, Max A. Viergever, Daniel Bystrov, Chris A. Cocosco, Thomas Netsch, Julien Senegas
Publikováno v:
CARS
A method for computing a region of interest (ROI) around the heart in short-axis 3D+time structural MRI cardiac scans is presented. The method is fully automatic, fast, makes only few, plausible assumptions about the images and was proved robust thro