Skip header and navigation

4 records – page 1 of 1.

Field free line magnetic particle imaging

http://libcat.nshealth.ca/permalink/provcat33586
Marlitt Erbe. Springer Vieweg , c2014.
Available Online
View e-Book
Location
Online
Marlitt Erbe provides a detailed introduction into the young research field of Magnetic Particle Imaging (MPI) and field free line (FFL) imaging in particular. She derives a mathematical description of magnetic field generation for FFL imaging in MPI. To substantiate the simulation studies on magnetic FFL generation with a proof-of-concept, the author introduces the FFL field demonstrator, which provides the world's first experimentally generated rotated and translated magnetic FFL field comply…
Available Online
View e-Book
Author
Erbe, Marlitt
Responsibility
Marlitt Erbe
Place of Publication
Wiesbaden
Publisher
Springer Vieweg
Date Published
c2014
Physical Description
1 online resource (xxvii, 154 pages)
Series Vol.
[8]
Series Title
Aktuelle Forschung Medizintechnik = Latest Research in Medical Engineering
ISBN
9783658053369
9783658053376 (electronic bk.)
Subjects (MeSH)
Diagnostic imaging - instrumentation
Magnetic Fields
Subjects (LCSH)
Magnetic fields - Research
Magnetic particle imaging
Notes
Some text is also presented in German.
Abstract
Marlitt Erbe provides a detailed introduction into the young research field of Magnetic Particle Imaging (MPI) and field free line (FFL) imaging in particular. She derives a mathematical description of magnetic field generation for FFL imaging in MPI. To substantiate the simulation studies on magnetic FFL generation with a proof-of-concept, the author introduces the FFL field demonstrator, which provides the world's first experimentally generated rotated and translated magnetic FFL field complying with the requirements for FFL reconstruction. Furthermore, she proposes a scanner design of considerably enhanced magnetic field quality and efficiency. The author discusses the influence of magnetic field quality optimization on the image quality achieved using efficient Radon-based reconstruction methods, which arise for a line detection scheme, and based on this optimized design, presents a dynamic FFL scanner assembly.
Contents
1. Introduction -- 2. Magnetic Particle Imaging -- 3. Introduction of a Field Free Line for MPI -- 4. Theory of Magnetic Field Free Line Generation -- 5. A Field Free Line Field Demonstrator -- 6. Scanner Efficiency and Field Quality Analysis -- 7. Efficient Reconstruction Algorithms -- 8. A Dynamic Field Free Line Imaging Device -- 9. Summary -- 10. Discussion and Outlook.
Format
e-Book
Location
Online
thumbnail

Registration methods for pulmonary image analysis : integration of morphological and physiological knowledge

http://libcat.nshealth.ca/permalink/provcat33807
Alexander Schmidt-Richberg. Springer Vieweg , c2014.
Available Online
View e-Book
Location
Online
Various applications in the field of pulmonary image analysis require a registration of CT images of the lung. For example, a registration-based estimation of the breathing motion is employed to increase the accuracy of dose distribution in radiotherapy. Alexander Schmidt-Richberg develops methods to explicitly model morphological and physiological knowledge about respiration in algorithms for the registration of thoracic CT images. The author focusses on two lung-specific issues: on the one ha…
Available Online
View e-Book
Author
Schmidt-Richberg, Alexander
Responsibility
Alexander Schmidt-Richberg
Place of Publication
Wiesbaden
Publisher
Springer Vieweg
Date Published
c2014
Physical Description
1 online resource (xvi, 168 pages)
Series Title
Aktuelle Forschung Medizintechnik = Latest Research in Medical Engineering
ISBN
9783658016616
9783658016623 (electronic bk.)
Subjects (MeSH)
Four-Dimensional Computed Tomography - methods
Image interpretation, computer-assisted
Lung - radiography
Models, theoretical
Subjects (LCSH)
Image analysis - Mathematical models
Image registration
Lungs - Tomography
Abstract
Various applications in the field of pulmonary image analysis require a registration of CT images of the lung. For example, a registration-based estimation of the breathing motion is employed to increase the accuracy of dose distribution in radiotherapy. Alexander Schmidt-Richberg develops methods to explicitly model morphological and physiological knowledge about respiration in algorithms for the registration of thoracic CT images. The author focusses on two lung-specific issues: on the one hand, the alignment of the interlobular fissures and on the other hand, the estimation of sliding motion at the lung boundaries. He shows that by explicitly considering these aspects based on a segmentation of the respective structure, registration accuracy can be significantly improved.
Contents
1. Introduction -- 2. Current methods for lung registration -- 3. Variational image registration -- 4. Variational level set segmentation -- 5. Lung registration with explicit interlobular fissure alignment -- 6. Sliding motion in image registration -- 7. Evaluation with clinical image data -- 8. Conclusions -- A. On digital images -- B. Mathematical derivations -- C. Supplementary results -- List of notations.
Format
e-Book
Location
Online
thumbnail

Three-dimensional digital tomosynthesis : iterative reconstruction, artifact reduction and alternative acquisition geometry

http://libcat.nshealth.ca/permalink/provcat34007
Yulia Levakhina. Springer Vieweg , c2014.
Available Online
View e-Book
Location
Online
Yulia Levakhina gives an introduction to the major challenges of image reconstruction in Digital Tomosynthesis (DT), particularly to the connection of the reconstruction problem with the incompleteness of the DT dataset. The author discusses the factors which cause the formation of limited angle artifacts and proposes how to account for them in order to improve image quality and axial resolution of modern DT. The addressed methods include a weighted non-linear backprojection scheme for algebrai…
Available Online
View e-Book
Author
Levakhina, Yulia
Responsibility
Yulia Levakhina
Place of Publication
Wiesbaden
Publisher
Springer Vieweg
Date Published
c2014
Physical Description
1 online resource (xviii, 192 pages)
Series Vol.
14
Series Title
Aktuelle Forschung Medizintechnik = Latest Research in Medical Engineering
ISBN
9783658056964
9783658056971 (electronic bk.)
Subjects (MeSH)
Image processing, computer-assisted
Imaging, three-dimensional - methods
Radiographic image enhancement
Tomography, X-ray computed
Subjects (LCSH)
Three-dimensional imaging
Tomography
Abstract
Yulia Levakhina gives an introduction to the major challenges of image reconstruction in Digital Tomosynthesis (DT), particularly to the connection of the reconstruction problem with the incompleteness of the DT dataset. The author discusses the factors which cause the formation of limited angle artifacts and proposes how to account for them in order to improve image quality and axial resolution of modern DT. The addressed methods include a weighted non-linear backprojection scheme for algebraic reconstruction and a novel dual-axis acquisition geometry. All discussed algorithms and methods are supplemented by detailed illustrations, hints for practical implementation, pseudo-code, simulation results and real patient case examples.
Contents
Introduction -- Where we are today: tomosynthesis research and development -- Forward and backprojection model (FP/BP) -- Iterative image reconstruction for tomosynthesis -- Backprojected space in image reconstruction -- Dual-axis tilt acquisition geometry -- Conclusions and suggestions for further work -- Appendix: MATLAB®.
Format
e-Book
Location
Online
thumbnail
Dierck Hillmann ; with a foreword by Gereon Hüttmann. Springer Vieweg , c2014.
Available Online
View e-Book
Location
Online
Holoscopy is a new tomographic imaging modality that combines techniques of digital holography with Fourier-domain optical coherence tomography (FD-OCT). Dierck Hillmann gives a theoretical introduction to the mathematics and physics of holoscopy and develops an efficient numerical reconstruction procedure. Compared to FD-OCT, holoscopy provides unique advantages by enabling tomographic imaging without a limited depth of focus, but results in an increased numerical cost for reconstruction. In f…
Available Online
View e-Book
Author
Hillmann, Dierck
Responsibility
Dierck Hillmann ; with a foreword by Gereon Hüttmann
Place of Publication
Wiesbaden
Publisher
Springer Vieweg
Date Published
c2014
Physical Description
1 online resource (xvii, 206 pages)
Series Title
Aktuelle Forschung Medizintechnik = Latest Research in Medical Engineering
ISBN
9783658064785
9783658064792 (electronic bk.)
Subjects (MeSH)
Tomography, optical coherence
Subjects (LCSH)
Optical coherence tomography
Notes
Originally presented as author's dissertation, University of Lübeck, 2013.
Abstract
Holoscopy is a new tomographic imaging modality that combines techniques of digital holography with Fourier-domain optical coherence tomography (FD-OCT). Dierck Hillmann gives a theoretical introduction to the mathematics and physics of holoscopy and develops an efficient numerical reconstruction procedure. Compared to FD-OCT, holoscopy provides unique advantages by enabling tomographic imaging without a limited depth of focus, but results in an increased numerical cost for reconstruction. In further chapters, the author introduces techniques for FD-OCT that are relevant to holoscopy as well. He demonstrates and compares numerical reconstruction methods for FD-OCT and shows how motion and dispersion artifacts in FD-OCT can be numerically compensated.
Contents
Introduction -- Theory -- FD-OCT signal processing using the NFFT [non-equispaced fast Fourier transform] -- Motion and dispersion correction in FD-OCT -- Holoscopy -- Conclusion -- Appendix A. Mathematical supplements -- Appendix B. Resolution in signal processing and optics -- Appendix C. Discretization of the reconstruction.
Format
e-Book
Location
Online
thumbnail

Revise Search

Narrow By