![Mutual Information Based Methods to Localize Image Registration [electronic Resource] PDF](https://books.google.com/books/content/images/frontcover/m1ycDAEACAAJ?fife=w80-h100)
Author: Kathleen P. Wilkie
Publisher: University of Waterloo
ISBN:
Category : Diagnostic imaging
Languages : en
Pages : 131
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Book Description
Modern medicine has become reliant on medical imaging. Multiple modalities, e.g. magnetic resonance imaging (MRI), computed tomography (CT), etc., are used to provide as much information about the patient as possible. The problem of geometrically aligning the resulting images is called image registration. Mutual information, an information theoretic similarity measure, allows for automated intermodal image registration algorithms. In applications such as cancer therapy, diagnosticians are more concerned with the alignment of images over a region of interest such as a cancerous lesion, than over an entire image set. Attempts to register only the regions of interest, defined manually by diagnosticians, fail due to inaccurate mutual information estimation over the region of overlap of these small regions. This thesis examines the region of union as an alternative to the region of overlap. We demonstrate that the region of union improves the accuracy and reliability of mutual information estimation over small regions. We also present two new mutual information based similarity measures which allow for localized image registration by combining local and global image information. The new similarity measures are based on convex combinations of the information contained in the regions of interest and the information contained in the global images. Preliminary results indicate that the proposed similarity measures are capable of localizing image registration. Experiments using medical images from computer tomography and positron emission tomography demonstrate the initial success of these measures. Finally, in other applications, auto-detection of regions of interest may prove useful and would allow for fully automated localized image registration. We examine methods to automatically detect potential regions of interest based on local activity level and present some encouraging results.
Author: K. A. Bachman
Publisher:
ISBN: 9783836484831
Category : Mathematics
Languages : de
Pages : 116
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Book Description
Mutual information, in addition to having application in fields such as communication and computer vision, has resulted in fully automated image registration methods. Mutual information, in the context of image registration, is given by the difference between the sum of the entropies of individual overlapping images and the joint entropy of the combined images. It is a measure of the reduction in uncertainty about one image due to knowledge of the other. The book begins with a broad overview of medical image registration as the context in which to present the discrete mutual information-based registration method. The theory and mathematics of discrete mutual information and its origin in information theory is presented, followed by discussion of its application in image registration. Finally, a specific example of mutual information-based medical 2D-2D image registration is presented: registration of digitally reconstructed radiographs (DRRs) and electronic portal images (EPIs).
Author: Yusuf Serkan Kirac
Publisher:
ISBN:
Category : Convergence
Languages : en
Pages : 122
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Book Description
Author: Luis Rueda
Publisher: Springer
ISBN: 3540767258
Category : Computers
Languages : en
Pages : 989
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Book Description
This book constitutes the refereed proceedings of the 12th Iberoamerican Congress on Pattern Recognition, CIARP 2007, held in Valparaiso, Chile, November 13-16, 2007. The 97 revised full papers presented together with four keynote articles were carefully reviewed and selected from 200 submissions. The papers cover ongoing research and mathematical methods for pattern recognition, image analysis, and applications in areas such as computer vision, robotics, industry and health.
Author: S. Sitharama Iyengar
Publisher: CRC Press
ISBN: 1000755665
Category : Computers
Languages : en
Pages : 767
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Book Description
The best-selling Distributed Sensor Networks became the definitive guide to understanding this far-reaching technology. Preserving the excellence and accessibility of its predecessor, Distributed Sensor Networks, Second Edition once again provides all the fundamentals and applications in one complete, self-contained source. Ideal as a tutorial for
Author: Arthur Ardeshir Goshtasby
Publisher: John Wiley & Sons
ISBN: 0471724262
Category : Technology & Engineering
Languages : en
Pages : 284
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Book Description
To master the fundamentals of image registration, there is no more comprehensive source than 2-D and 3-D Image Registration. In addition to delving into the relevant theories of image registration, the author presents their underlying algorithms. You'll also discover cutting-edge techniques to use in remote sensing, industrial, and medical applications. Examples of image registration are presented throughout, and the companion Web site contains all the images used in the book and provides links to software and algorithms discussed in the text, allowing you to reproduce the results in the text and develop images for your own research needs. 2-D and 3-D Image Registration serves as an excellent textbook for classes in image registration as well as an invaluable working resource.
Author: Zhao Yi
Publisher: University of Waterloo
ISBN: 9780494234938
Category :
Languages : en
Pages : 84
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Book Description
It is well known that biological structures such as human brains, although may contain the same global structures, differ in shape, orientation, and fine structures across individuals and at different times. Such variabilities during registration are usually represented by nonrigid transformations. This research seeks to address this issue by developing physically based models in which transformations are constructed to obey certain physical laws.
Author: Stefan Heldmann
Publisher:
ISBN: 9783832514815
Category :
Languages : en
Pages : 0
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Book Description
Mutual Information belongs to the most popular and powerful tools for multi-modal image registration. Nevertheless, its handling is involved, and despite a wide spread use in a large number of applications no standard treatment exists. Here, we present both theory and numerics for non-linear image registration based on mutual information. Building on a non-standard analysis of mutual information from the perspective of measure and integration theory, we develop PDE and optimization based registration methods. Crucial for the numerical schemes are efficient computation of mutual information and fast solving of the arising large linear systems. Addressing these points, we consider non-equispaced Fourier transforms and B-Splines techniques for the approximation of densities and develop fast FFT and multigrid solvers. Finally, we demonstrate the performance of the proposed methods in an application for the registration of 3D PET and CT images.
Author: Víctor Rodríguez Gil
Publisher:
ISBN:
Category :
Languages : en
Pages : 126
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Book Description
Author: Elson L. So
Publisher: Cambridge University Press
ISBN: 110703423X
Category : Medical
Languages : en
Pages : 259
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Book Description
This book critically appraises the role and value of specific diagnostic and treatment techniques for drug-resistant, MRI-negative epilepsy. The authors present the evidence and share their expertise on the diagnostic options and surgical approaches that make epilepsy surgery possible and worthwhile in this complex and challenging condition.
