133 Result(s)
within
English
Artificial Intelligence
Computer Graphics
Imaging / Radiology
Qi**ng Chen
Conference Paper
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Chapter and Conference Paper
Entropy-Based, Multiple-Portal-to-3DCT Registration for Prostate Radiotherapy Using Iteratively Estimated Segmentation
In external beam radiotherapy (EBRT), patient setup verification over the entire course of fractionated treatment is necessary for accurate delivery of specified dose to the tumor. We develop an information th...
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Chapter and Conference Paper
3-D Deformable Registration of Medical Images Using a Statistical Atlas
Registration between 3-D images of human anatomies enables cross-subject diagnosis. However, innate differences in the appearance and location of anatomical structures between individuals make accurate registr...
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Chapter and Conference Paper
Comparison of Land-Mark-Based and Curve-Based Thin-Plate Warps for Analysis of Left-Ventricular Motion from Tagged MRI
MRI is unique in its ability to non-invasively and selectively alter tissue magnetization, and create tagged patterns within a deforming body such as the heart muscle. The resulting grid patterns define non-in...
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Chapter and Conference Paper
Coronary Intervention Planning Using Hybrid 3D Reconstruction
A new method is presented to assist the clinician in planning a interventional procedure while the patient is already on the catheterization table. Based on several ECG-selected projections from a rotational X...
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Chapter and Conference Paper
Line Integral Convolution for Visualization of Fiber Tract Maps from DTI
Diffusion tensor imaging (DTI) can provide the fundamental information required for viewing structural connectivity. However, robust and accurate acquisition and processing algorithms are needed to accurately ...
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Chapter and Conference Paper
Medical Image Synthesis via Monte Carlo Simulation
A large number of test images and their “ground truth” segmentations are needed for performance characterization of the many image segmentation methods. In this work we developed a methodology to form a probab...
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Chapter and Conference Paper
Model-Updated Image Guidance: A Statistical Approach to Gravity-Induced Brain Shift
Compensating for intraoperative brain shift using computational models has been used with promising results. Since computational time is an important factor during neurosurgery, a prior knowledge of a patient’...
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Chapter and Conference Paper
Gibbs Prior Models, Marching Cubes, and Deformable Models: A Hybrid Framework for 3D Medical Image Segmentation
Hybrid frameworks combining region-based and boundary-based segmentation methods have been used in 3D medical image segmentation applications. In this paper we propose a hybrid 3D segmentation framework which ...
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Chapter and Conference Paper
Segmentation, Registration, and Deformation Analysis of 3D MR Images of Mice
We demonstrate our mouse MR image and shape analysis pipeline. The long term goal of our work is the description of structural shape variations in normal, genetically identical mice and the subsequent detectio...
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Chapter and Conference Paper
Segmentation of Left Ventricle via Level Set Method Based on Enriched Speed Term
Level set methods have been widely employed in medical image segmentation, and the construction of speed function is vital to segmentation results. In this paper, two ideas for enriching the speed function in ...
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Chapter and Conference Paper
Gabor Filter-Based Automated Strain Computation from Tagged MR Images
Myocardial tagging is a non-invasive MR imaging technique; it generates a periodic tag pattern in the magnetization that deforms with the tissue during the cardiac cycle. It can be used to assess regional myoc...
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Chapter and Conference Paper
Deformation Based Representation of Groupwise Average and Variability
This paper presents a novel method for creating an unbiased and geometrically centered average from a group of images. The morphological variability of the group is modeled as a set of deformation fields which...
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Chapter and Conference Paper
Simultaneous Segmentation and Registration for Medical Image
Although segmentation and registration are usually considered separately in medical image analysis, they can obviously benefit a great deal from each other. In this paper, we propose a novel scheme of simultan...
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Chapter and Conference Paper
3D Cardiac Anatomy Reconstruction Using High Resolution CT Data
Recent advances in CT technology have allowed thh development of systems with multiple rows of detectors snd rapid rotation. These new imaging systems have permitted the acquisition of high resolution, spatial...
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Chapter and Conference Paper
Real-Time 4D Tumor Tracking and Modeling from Internal and External Fiducials in Fluoroscopy
Fluoroscopy is currently used in treatment planning for patients undergoing radiation therapy. Radiation oncologists would like to maximize the amount of dose the tumor receives and minimize the amount deliver...
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Chapter and Conference Paper
Ligament Strains Predict Knee Motion After Total Joint Replacement
A passive forward kinematics knee model was used to predict knee motion of a total joint replacement. Given a joint angle, maps of articular surfaces, and patient-specific ligament properties, this model predi...
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Chapter and Conference Paper
76-Space Analysis of Grey Matter Diffusivity: Methods and Applications
Diffusion Weighted Imaging (DWI) and Diffusion Tensor Imaging (DTI) are widely used in the study and diagnosis of neurological diseases involving the White Matter (WM). However, many neurological and neurodege...
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Chapter and Conference Paper
Point-Based Geometric Deformable Models for Medical Image Segmentation
Conventional level set based image segmentations are performed upon certain underlying grid/mesh structures for explicit spatial discretization of the problem and evolution domains. Such computational grids, h...
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Chapter and Conference Paper
A Variational PDE Based Level Set Method for a Simultaneous Segmentation and Non-rigid Registration
A new variational PDE based level set method for a simultaneous image segmentation and non-rigid registration using prior shape and intensity information is presented. The segmentation is obtained by finding a...
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Chapter and Conference Paper
Geodesic Active Contours with Adaptive Neighboring Influence
While geometric deformable models have brought tremendous impacts on shape representation and analysis in medical image analysis, some of the remaining problems include the handling of boundary leakage and the...
