Journal article
Monoplanar gradient system for imaging with nonlinear gradients.
- Littin S Department of Diagnostic Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Str. 60a, 79106, Freiburg, Germany. sebastian.littin@uniklinik-freiburg.de.
- Gallichan D CIBM, EPFL, Lausanne, Switzerland.
- Welz AM Department of Diagnostic Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Str. 60a, 79106, Freiburg, Germany.
- Jia F Department of Diagnostic Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Str. 60a, 79106, Freiburg, Germany.
- Dewdney A Healthcare Sector, Siemens AG, Erlangen, Germany.
- Weber H Department of Diagnostic Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Str. 60a, 79106, Freiburg, Germany.
- Schultz G Department of Diagnostic Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Str. 60a, 79106, Freiburg, Germany.
- Hennig J Department of Diagnostic Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Str. 60a, 79106, Freiburg, Germany.
- Zaitsev M Department of Diagnostic Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Str. 60a, 79106, Freiburg, Germany.
- 2015-02-17
Published in:
- Magma (New York, N.Y.). - 2015
Gradients
Image reconstruction
Magnetic resonance imaging (MRI)
Nonlinear encoding fields
PatLoc
Planar gradient
Spatial encoding
Algorithms
Artifacts
Data Compression
Equipment Design
Equipment Failure Analysis
Humans
Image Enhancement
Image Interpretation, Computer-Assisted
Imaging, Three-Dimensional
Magnetic Resonance Imaging
Nonlinear Dynamics
Phantoms, Imaging
Sensitivity and Specificity
Signal Processing, Computer-Assisted
English
OBJECT
In this paper we present a monoplanar gradient system capable of imaging a volume comparable with that covered by linear gradient systems. Such a system has been designed and implemented.
MATERIALS AND METHODS
Building such a system was made possible by relaxing the constraint of global linearity and replacing it with a requirement for local orthogonality. A framework was derived for optimization of local orthogonality within the physical boundaries and geometric constraints. Spatial encoding of magnetic fields was optimized for their local orthogonality over a large field of view.
RESULTS
A coil design consisting of straight wire segments was optimized, implemented, and integrated into a 3T human scanner to show the feasibility of this approach. Initial MR images are shown and further applications of the derived optimization method and the nonlinear planar gradient system are discussed.
CONCLUSION
Encoding fields generated by the prototype encoding system were shown to be locally orthogonal and able to encode a cylindrical volume sufficient for some abdomen imaging applications for humans.
In this paper we present a monoplanar gradient system capable of imaging a volume comparable with that covered by linear gradient systems. Such a system has been designed and implemented.
MATERIALS AND METHODS
Building such a system was made possible by relaxing the constraint of global linearity and replacing it with a requirement for local orthogonality. A framework was derived for optimization of local orthogonality within the physical boundaries and geometric constraints. Spatial encoding of magnetic fields was optimized for their local orthogonality over a large field of view.
RESULTS
A coil design consisting of straight wire segments was optimized, implemented, and integrated into a 3T human scanner to show the feasibility of this approach. Initial MR images are shown and further applications of the derived optimization method and the nonlinear planar gradient system are discussed.
CONCLUSION
Encoding fields generated by the prototype encoding system were shown to be locally orthogonal and able to encode a cylindrical volume sufficient for some abdomen imaging applications for humans.
- Language
-
- English
- Open access status
- closed
- Identifiers
-
- DOI 10.1007/s10334-015-0481-8
- PMID 25684133
- Persistent URL
- https://sonar.ch/global/documents/225861
Statistics
Document views: 29
File downloads: