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- ASM, TMS partner with Springer on journals.(ASM NEWS)
- ASM International and The Minerals, Metals & Materials Society TMS have announced a new partnership with Springer, part of Springer Science+Business Media, a leading supplier of scientific literature. Starting this month, Springer will publis ASM International and The Minerals, Metals & Materials Society ...
- Research articles 2007-01-01
- Regularization of Diffusion Tensor Maps Using a Non-Gaussian Markov Random Field Approach
- This paper proposes a novel non-Gaussian MRF for regularization of tensor fields for fiber tract enhancement. Two entities are considered in the model, namely, the linear component of the tensor, i.e., how much line-like the tensor is and the angle of the eigenvector associated to the largest eigenvalue. A novel,...
- White papers 2003-11-10
- Homomorphic Filtering of DT-MRI Fields
- DT-MRI fields measure the self-diffusion of water in biological tissue and, hence, tensors from these fields must be symmetric positive definite PSD. However, due to a number of reasons this is not true for real data. Furthermore, it would be desirable to maintain that condition when tensor data are filtered....
- White papers 2003-11-10
- Geostatistical Medical Image Registration
- This paper proposes a novel approach to landmark-based medical image registration based on the geostatical method of Kriging prediction. This method exploits the spatial statistical relation between two images, as estimated using general purpose registration algorithms, in order to construct an optimum predictor of the displacement field. High accuracy is...
- White papers 2003-11-10
- Tensor Splats: Visualizing Tensor Fields by Texture Mapped Volume Rendering
- This paper describes a new method for visualizing tensor fields using a textured mapped volume rendering approach, tensor-splatting. It uses an image order method to calculate the 2D Gaussian splats or footprints of the projected 3D Gaussians at an arbitrary number of standard deviations from the centroid. These footprints are...
- White papers 2003-11-10
- New Approaches to Estimation of White Matter Connectivity in Diffusion Tensor MRI: Elliptic PDEs and Geodesics in a Tensor-Warped Space
- This paper investigates new approaches to quantifying the white matter connectivity in the brain using Diffusion Tensor Magnetic Resonance Imaging data. Their first approach finds a steady-state concentration/ heat distribution using the three-dimensional tensor field as diffusion/ conductivity tensors. Their second approach casts the problem in a Riemannian framework, deriving...
- White papers 2002-10-02
- The Emotional Intelligence of Managers: Assessing the Construct Validity of a Nonverbal Measure of "People Skills"
- Researchers have long been interested in managerial socio-emotional competency - "People skills." One problem has been that many such competencies are properly categorized as nonverbal in nature, yet researchers typically utilize paper and pencil, verbal, measures to assess these. This paper draws upon emerging literature on emotional intelligence, as well...
- White papers 2001-03-12
- Taxes and Venture Capital Support
- In this paper a model of start-up finance is set up under double moral hazard. Entrepreneurs lack own resources and business experience to develop their ideas. Venture capitalists can provide start-up finance and commercial support. The effort put forth by either agent contributes to the firm's success, but is not...
- White papers 2004-03-25
- The Role of Retail Competition, Demographics and Account Retail Strategy as Drivers of Promotional Sensitivity
- This paper studies the determinants of sensitivity to the promotional activities of temporary price reductions, displays, and feature advertisements. Both the theoretical and empirical literatures on price promotions suggest that retailer competition and the demographic composition of the shopping population should be linked to response to temporary price cuts. However,...
- White papers 2004-05-15
- Phase-Driven Finite Element Model for Spatio-Temporal Tracking in Cardiac Tagged MRI
- MRI tissue tagging of the heart produces noninvasive markers within the muscle wall that can be used to measure motion and deformation. However, the widespread use of tissue tagging has been limited by time-consuming image post-processing. This paper outlines a method for automatic 3D tracking of LV motion from 2D...
- White papers 2001-10-04
- Tensor Field Regularization Using Normalized Convolution
- This paper presents a filtering technique for regularizing tensor fields. It uses a nonlinear filtering technique termed normalized convolution, a general method for filtering missing and uncertain data. In the present work we extend the signal certainty function to depend on locally derived certainty information in addition to the priory...
- White papers 2004-04-13
- Improved Non-Rigid Registration of Prostate MRI
- This paper introduces a fast non-rigid registration method for aligning pre-operative 1.5 T MR Images to intra-operative 0.5 T MR Images for guidance in prostate biopsy. After the acquisition of both pre-operative 1.5 T and intra-operative 0.5 T, an intensity correction method is applied to the pre-operative images to reduce...
- White papers 2004-08-30
- Exact MAP Activity Detection in fMRI Using a GLM With an Ising Spatial Prior
- In this paper, they show that standard activation statistics, such as F-statistics, are derived from the log-likelihood ratio of a subset hypothesis test under classical, linear models of the BOLD signal. Consequently, the same exact MAP activity detection mechanism can be used with such General Linear Models GLMs; thereby controlling...
- White papers 2004-08-30
- Modelling Surgical Cuts, Retractions, and Resections Via Extended Finite Element Method
- This paper introduces a new, efficient approach for modelling the deformation of organs following surgical cuts, retractions, and resections. It uses the extended finite element method XFEM, recently developed in "fracture mechanics" for dealing with cracks in mechanical parts. XFEM eliminates the computationally-expensive remeshing that would be required if the...
- White papers 2004-08-30
- Control System for MR-Guided Cryotherapy: Short-Term Prediction of Therapy Boundary Using Automatic Segmentation and 3D Optical Flow
- During cryotherapy, it is extremely useful for the interventionalists to have available intra-operatively a 3D iceball visualization, to ensure the effectiveness and safety of the procedure. Additionally, it is highly beneficial to provide the interventionalists with a best estimate of how the iceball will grow in the future, and an...
- White papers 2004-08-30
- Level Set Methods in an EM Framework for Shape Classification and Estimation
- This paper proposes an Expectation-Maximization approach to separate a shape database into different shape classes, while simultaneously estimating the shape contours that best exemplify each of the different shape classes. They begin their formulation by employing the level set function as the shape descriptor. Next, for each shape class they...
- White papers 2004-08-30
- Precise Evaluation of Positioning Repeatability of MR-Compatible Manipulator Inside MRI
- This paper is based on an experiment for testing the positioning repeatability of MR-compatible manipulator with a CCD laser micrometer inside MRI. To evaluate the performance of MR-compatible manipulator inside MRI, the measuring system must be confirmed to work correctly inside MRI in advance. Therefore, the measuring system was tested...
- White papers 2004-08-30
- 3D Analysis of Radiofrequency-Ablated Tumors in Liver: A Computer-Aided Diagnosis Tool for Early Detection of Local Recurrences
- Radiofrequency ablation is being used increasingly in the treatment of liver tumors, and the detection of local recurrences on follow-up imaging is an important and occasionally challenging task. When the tumor is not associated with nodular enhancement, recurrence detection only relies on a precise identification of shape changes in the...
- White papers 2004-08-30
- Anisotropic Interpolation of DT-MRI
- Diffusion tensor MRI (DT-MRI) is an image modality that is gaining clinical importance. After some preliminaries that describe the fundamentals of this imaging modality, they present a new technique to interpolate the diffusion tensor field, preserving boundaries and the constraint of positive-semi definiteness. Their approach is based on the use...
- White papers 2004-09-01
- Interface Detection in Diffusion Tensor MRI
- This paper presents a new method for detecting the interface, or edge, structure present in diffusion MRI. Interface detection is an important first step for applications including segmentation and registration. Additionally, due to the higher dimensionality of tensor data, humans are visually unable to detect edges as easily as in...
- White papers 2004-09-01
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