637 Result(s)
within
Medicine & Public Health
Artificial Intelligence
Image Processing and Computer Vision
**e **an
Chapter
Conference Paper
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Chapter and Conference Paper
Real-Time Estimation of Hip Range of Motion for Total Hip Replacement Surgery
This paper presents the design and implementation of a range of motion estimation method that is capable of fine-grained estimation during total hip replacement (THR) surgery. Our method combines an adaptive r...
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Chapter and Conference Paper
Estimation of Anatomical Connectivity by Anisotropic Front Propagation and Diffusion Tensor Imaging
Diffusion Tensor Magnetic Resonance Imaging (DT-MRI) allows one to capture the restricted diffusion of water molecules in fibrous tissues which can be used to infer their structural organization. In this paper...
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Chapter and Conference Paper
Segmentation of 3D Probability Density Fields by Surface Evolution: Application to Diffusion MRI
We propose an original approach for the segmentation of three-dimensional fields of probability density functions. This presents a wide range of applications in medical images processing, in particular for dif...
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Chapter and Conference Paper
A Spatio-temporal Analysis of Contrast Ultrasound Image Sequences for Assessment of Tissue Perfusion
The evaluation of tissue perfusion in various parenchymatous organs is important in the diagnosis and determination of the severity of ischemic disease. Contrast ultrasound perfusion imaging can be used for th...
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Chapter and Conference Paper
Fast Automated Segmentation and Reproducible Volumetry of Pulmonary Metastases in CT-Scans for Therapy Monitoring
The assessment of metastatic growth under chemotherapy belongs to the daily radiological routine and is currently performed by manual measurements of largest nodule diameters. As in lung cancer screening where...
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Chapter and Conference Paper
Empirical Evaluation of Covariance Estimates for Mutual Information Coregistration
Mutual information has become a popular similarity measure in multi-modality medical image registration since it was first applied to the problem in 1995. This paper describes a method for calculating the cova...
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Chapter and Conference Paper
Photorealistic Rendering of Large Tissue Deformation for Surgical Simulation
With the increasing use of computer based simulation for training and skills assessment, growing effort is being directed towards enhancing the visual realism of the simulation environment. Image-based modelli...
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Chapter and Conference Paper
A Modular Scalable Approach to Occlusion-Robust Low-Latency Optical Tracking
An advanced optical tracking system for computer assisted surgery (CAS) is presented. The system supports an arbitrary number of cameras that may be placed at suitable positions e.g. fixed cameras at the ceili...
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Chapter and Conference Paper
Detection of Micro- to Nano-Sized Particles in Soft Tissue
The demand is growing to study particulate debris in the human organism. This task is time-consuming. Therefore it is important to find an efficient way of particle identification and analysis. Carriers of hip...
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Chapter and Conference Paper
Data Driven Brain Tumor Segmentation in MRI Using Probabilistic Reasoning over Space and Time
A semi-automated method for brain tumor segmentation and volume tracking has been developed. This method uses a pipeline approach to process MRI images. The pipeline process involves the following steps: 1) au...
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Chapter and Conference Paper
How Accurate Is Brain Volumetry?
We evaluate the accuracy and precision of different techniques for measuring brain volumes based on MRI. We compare two established software packages that offer an automated image analysis, EMS and SIENAX, and...
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Chapter and Conference Paper
Determining Malignancy of Brain Tumors by Analysis of Vessel Shape
Vessels supplying malignant tumors are abnormally shaped. This paper describes a blinded study that assessed tumor malignancy by analyzing vessel shape within MR images of 21 brain tumors prior to surgical res...
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Chapter and Conference Paper
Co-analysis of Maps of Atrophy Rate and Atrophy State in Neurodegeneration
The variability in atrophy rate in patients with neurodegenerative disease can be partially explained by disease stage. Since atrophy state (baseline scan tissue volume) correlates with cognitive impairment an...
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Chapter and Conference Paper
Cardiac Motion and Elasticity Characterization with Iterative Sequential \(\mathcal{H}_\infty\) Criteria
Robustness is of paramount importance in cardiac wall motion estimation and myocardial tissue elasticity characterization, especially for clinical applications. Given partial, noisy, image-derived measurements...
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Chapter and Conference Paper
Robotic Strain Imaging for Monitoring Thermal Ablation of Liver
This report describes our initial in vitro results with robotically-assisted strain imaging for intraoperative monitoring of hepatic tumor thermal ablation. First, we demonstrate a strong correlation between ther...
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Chapter and Conference Paper
Cartilage Thickness Measurement in the Sub-millimeter Range
We present a method to measure cartilage thickness from CT images in the sub millimeter range. Current methods based on zero crossings of second derivatives across the cartilage layers are known to be biased i...
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Chapter and Conference Paper
Spatial-Stiffness Analysis of Surface-Based Registration
We have developed a new approach for preoperative selection of points from a surface model for rigid shape-based registration. This approach is based on an extension of our earlier spatial-stiffness model of f...
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Chapter and Conference Paper
Multi-subject Registration for Unbiased Statistical Atlas Construction
This paper introduces a new similarity measure designed to bring a population of segmented subjects into alignment in a common coordinate system. Our metric aligns each subject with a hidden probabilistic mode...
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Chapter and Conference Paper
Fast Soft Tissue Deformation with Tetrahedral Mass Spring Model for Maxillofacial Surgery Planning Systems
Maxillofacial surgery simulation and planning is an extremely challenging area of research combining medical imagery, computer graphics and mathematical modelling. In maxillofacial surgery abnormalities of the...
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Chapter and Conference Paper
Correction of Movement Artifacts from 4-D Cardiac Short- and Long-Axis MR Data
Typically a cardiac MR cine series consists of images over several time points but only from one spatial location. The volumetric information is obtained by combining 2-D slices from different image series. If...
