Hledat
Zobrazují se záznamy 41-50 z 110
Line filtering for detection of microtools in 3D ultrasound data
(IEEE, 2009-09)
We propose a robust method for localization of elongated surgical tools in 3D ultrasound data based on shape analysis. The tubular structures in input data are enhanced by a line filter in the pre-processing phase. A new ...
Discrete curvature calculation for fast level set segmentation
(IEEE, 2009-11)
Fast level set methods replace continuous PDEs by a discrete formulation, improving the execution times. The regularization in fast level set methods was so far handled indirectly via level set function smoothing. We propose ...
Fast no ground truth image registration accuracy evaluation: Comparison of bootstrap and Hessian approaches
(IEEE, 2008-05)
Image registration algorithms provide a displacement field between two images. We consider the problem of estimating accuracy of the calculated displacement field from the input images only and without assuming any specific ...
2-D Locally Regularized Tissue Strain Estimation From Radio-Frequency Ultrasound Images: Theoretical Developments and Results on Experimental Data
(IEEE, 2008-02)
In this paper, a 2-D locally regularized strain estimation method for imaging deformation of soft biological tissues from radio-frequency (RF) ultrasound (US) data is introduced. Contrary to most 2-D techniques that model ...
Bootstrap Resampling for Image Registration Uncertainty Estimation Without Ground Truth
(IEEE, 2010-01)
We address the problem of estimating the uncertainty of pixel based image registration algorithms, given just the two images to be registered, for cases when no ground truth data is available. Our novel method uses bootstrap ...
The fast multipole method for the direct E/MEG problem
(IEEE, 2002)
Reconstructing neuronal activity from MEG and EEG measurements requires the accurate calculation of the electromagnetic field inside the head. The boundary element formulation of this problem leads to a dense linear system ...
Multi-resolution parallel integral projection for fast localization of a straight electrode in 3D ultrasound images
(IEEE, 2008-05)
We address the problem of fast and accurate localization of miniature surgical instruments like needles or electrodes using 3D ultrasound (US). An algorithm based on maximizing a parallel integral transform (PIP) can ...
3D Ultrasound real-time monitoring of surgical tools
(IEEE, 2010-10)
To assist surgeons during their surgical operations, which involve a tool insertion, a real-time application which is able to localise the surgical tool during its movement is proposed. The position of the needle is estimated ...
Reducing false positive responses in lung nodule detector system by asymmetric adaboost
(IEEE, 2008-05)
We are developing a complex computer aided diagnosis (CAD) system to detect small pulmonary nodules from helical CT scans. Here we present a classifier to reduce the number of false positive responses of the primary detector. ...
Comparison of Methods for Tool Localization in Biological Tissue from 3D Ultrasound Data
(IEEE, 2006-10)
In medical applications, miniature surgical instruments such as needles, or electrodes are introduced into human body. The position of instrument in tissue can be estimated using 3D ultrasound. In previous publications, ...