Proceedings IEEE International Symposium on Biomedical Imaging
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Simultaneous validation of image segmentation and assessment of expert quality [tumor MRI application]
- Trang 94-97
Characterizing the performance of image segmentation approaches has been a persistent challenge. Interactive drawing of the desired segmentation by domain experts has often been the only acceptable approach, and yet suffers from intra-expert and inter-expert variability. Algorithms have been sought in order to remove the variability introduced by experts. The accuracy of segmentations of medical i......
#Image segmentation #Biomedical imaging #Imaging phantoms #Volume measurement #Sensitivity and specificity #Surgery #Laboratories #Hospitals #Maximum likelihood estimation #Image recognition
Independent component imaging of disease signatures
- Trang 457-460
This paper describes a neural computation approach to independent component imaging of disease signatures. The novel feature is to separate mixed imagery sources blindly over an informative index subspace. The recovery of patterns is achieved by independent component analysis, whose parameters are estimated using the infomax principle. We discuss the theoretic roadmap of the approach, and its appl......
#Diseases #Independent component analysis #Positron emission tomography #Parameter estimation #Gene expression #Neoplasms #Contamination #Computer science #Paper technology #Radiology
Hybrid MR/near infrared imaging of the murine brain: optimization of optical fiber arrangement and use of a-priori knowledge
- Trang 74-77
In this work we will present our initial study into the use of hybrid MRI/Near Infrared (NIR) imaging system and the reconstruction algorithm for the murine head. We will show that the arrangement of optical fibers on one side of the head, near the brain, will provide more information about optical changes within the brain. Also, we will show that by the use of a-priori information from MRI and ap......
#Infrared imaging #Optical fibers #Head #Magnetic resonance imaging #Optical imaging #Image reconstruction #Image segmentation #Spatial resolution #Reconstruction algorithms #Tomography
Searching similar images for classification of pulmonary nodules in three-dimensional CT images
- Trang 189-192
This paper aims at obtaining diagnosis and prognosis information by searching similar images into a three-dimensional (3-D) CT image database of pulmonary nodules for which diagnosis is known. For this purpose, we propose an automatic method to retrieve nodule candidates with similar characteristics from the database. Each pulmonary nodule image is represented by the distribution pattern of CT den......
#Computed tomography #Image databases #Cancer #Lungs #Spatial databases #Information retrieval #Clinical diagnosis #Image segmentation #Biomedical optical imaging #Optical sensors
Electrical impedance imaging with electrode models: initial in vivo experience in the breast
- Trang 1043-1046
Electrical impedance imaging of the breast is potentially promising but faces a number of challenges related to improving the sensitivity and reliability of the technique. Electrode models have been accepted as important components of image reconstruction but little practical experience with their use during image reconstruction from in vivo data has been reported. In this paper, we describe our a......
#Electrodes #In vivo #Breast #Image reconstruction #Surface impedance #Conductivity #Surface reconstruction #Mathematical model #Image quality #Electric potential
3D reconstruction of 2D crystals from projections in real space
- Trang 689-692
A new algorithm for 3D reconstruction of two-dimensional crystals from projections is presented, and applied to biological macromolecules imaged using electron microscopy. Its main departure from the traditional approach is that it works in real space, rather than in Fourier space, and is iterative. This approach has the advantage of making it convenient to introduce additional constraints (such a......
#Crystals #Image reconstruction #Transmission electron microscopy #Crystallization #Lattices #Iterative methods #Electron microscopy #Fourier transforms #Iterative algorithms #Molecular biophysics
Three dimensional functional cartography of the human basal ganglia by registration of optical and histological serial sections
- Trang 329-332
In functional neurosurgery, there is a need for accurate localisation of the functional targets. One example is given by Parkinson's disease. The surgical intervention is based on the introduction of electrodes in the subthalamic nucleus. This nucleus is targeted on pre-operative stereotactic MR acquisitions. But MR imaging of the basal ganglia is intrinsically limited, first by image resolution, ......
#Humans #Basal ganglia #Optical imaging #Image reconstruction #Neurosurgery #Parkinson's disease #Surgery #Electrodes #Image resolution #Anatomy
Automated interictal spike detection and source localization in MEG using ICA and spatial-temporal clustering
- Trang 785-788
MEG dipole localization of epileptic spikes is useful in epilepsy surgery for mapping the extent of abnormal cortex and to focus intracranial electrodes. Visually analyzing large amounts of data produces fatigue and error. Most existing methods are based on matching of interictal spike templates or predictive filtering of the data and do not explicitly include source localization as part of the an......
#Independent component analysis #Epilepsy #Surfaces #Electronic mail #Filtering #Laboratories #Hospitals #Surgery #Electrodes #Fatigue
Automatic segmentation of mammographic masses using fuzzy shadow and maximum-likelihood analysis
- Trang 241-244
This study attempted to accurately segment tumors in mammograms. Although this task is considered to be a preprocessing step in a computer analysis program, it plays an important role for further analysis of breast lesions. The region of interest (ROI) was segmented using the pixel aggregation and region growing techniques combined with maximum likelihood analysis. A fast segmentation algorithm ha......
#Cancer #Image databases #Radiology #Breast neoplasms #Testing #Image segmentation #Intersymbol interference #Lesions #Benign tumors #Pixel
Synchrotron radiation coronary microangiography in isolated perfused rat heart for evaluation of coronary vascular response
- Trang 561-564
Visualization of vasoconstriction and vasodilatation of coronary arteries with vasoactive agents is a useful research tool for evaluation of coronary vascular reserve. Microangiography with spatial resolution in the micrometer range was carried out to depict coronary vascular response in a rat heart under Langendorff perfusion using a high-speed imaging system and a third generation synchrotron ra......
#Synchrotron radiation #Heart #Optical imaging #X-ray imaging #Visualization #Arteries #High-resolution imaging #Spatial resolution #X-ray detection #X-ray detectors