Discrete optimization offers attractive capabilities for non-rigid medical image registration. Based on previous work on stereo vision with large displacement spaces, we propose a novel non-rigid registration method. The main idea to minimize the computational burden to constant time complexity is to reduce the search space hierarchically from coarse to fine levels. The large search space helps...

Non-rigid image registration is an ill-posed yet challenging problem due to its supernormal high degree of freedoms and inherent requirement of smoothness. Graph-cuts method is a powerful combinatorial optimization tool which has been successfully applied into image segmentation and stereo matching. Under some specific constraints, graph-cuts method yields either a global minimum or a local min...

As part of the ITK v4 project efforts, we have developed ITK filters for physics-based non-rigid registration (PBNRR), which satisfies the following requirements: account for tissue properties in the registration, improve accuracy compared to rigid registration, and reduce execution time using GPU and multi-core accelerators. The implementation has three main components: (1) Feature Point Selec...

As part of the ITK v4 project efforts, we have developed ITK filters for physics-based non-rigid registration (PBNRR), which satisfies the following requirements: account for tissue properties in the registration, improve accuracy compared to rigid registration, and reduce execution time using GPU and multi-core accelerators. The implementation has three main components: (1) Feature Point Selec...

A mathematical formulation for intensity-based slice-to-volume registration is proposed. The approach is flexible and accommodates various regularization schemes, similarity measures, and optimizers. The framework is evaluated by registering 2D and 3D cardiac magnetic resonance (MR) images obtained in vivo, aimed at realtime MR-guided applications. Rigid-body and affine transformations are used...

BACKGROUND Intravascular ultrasound (IVUS) has been widely used in diagnosis and interventional treatment of cardiac vessel diseases. The coronary artery IVUS images are usually polluted by motion artifacts caused by cardiac motion, pulsatile blood and catheter twist during continuous pullback acquisition. OBJECTIVE Strategies for rigid and elastic registration of coronary artery IVUS studies...

We present in this paper an iterative algorithm for the simultaneous registration of multiple 3D medical images. The proposed algorithm is a point-based registration method and is based on global registration techniques rather than the traditional pair-wise registration methods. Corresponding feature points, known as extremal points, are first automatically extracted from the 3D images and are ...

Title of Document: PARALLEL COMPUTATION OF NONRIGID IMAGE REGISTRATION Frances Kimpik Leung, Master of Science, 2010 Directed By: Professor Raj Shekhar, Dept of Diagnostic Radiology (University of Maryland, Baltimore) and Dept of Electrical and Computer Engineering Automatic intensity-based nonrigid image registration brings significant impact in medical applications such as multimodality fusio...

Introduction: Dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) is a very promising method for noninvasive assessment of renal function such as renal perfusion or glomular filtration rate. The acquisition of DCE-MRI for that purpose is usually performed during free breathing because the scan duration, necessary for data analysis, is typically in the order of several minutes. The ph...

vii