Proceedings IEEE International Symposium on Biomedical Imaging
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Parcellation of brain images with anatomical and functional constraints for fMRI data analysis
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 907-910
We propose a methodology for brain parcellation with anatomical and functional constraints dedicated to fMRI data analysis. The aim is to provide a representation of fMRI data at any intermediate dimensionality between voxel and region of interest. In order to fill in the gap between these two approaches we developed an automatic parcellation of the 3D cortex with an adjustable resolution. The alg...... hiện toàn bộ
#Brain #Data analysis #Spatial resolution #Anatomy #Image resolution #Signal resolution #Image analysis #Testing #Clustering algorithms #Magnetic analysis
Image reconstruction without multiple-bounce ghosting artifacts
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 1001-1004
Develops an innovative image reconstruction technique for reflection tomography based upon the extraction of multiple-bounce (MB) ghosting artifacts. The basic concept is that the time-of-flight between the transmission and reception of a waveform includes the realistic effects of MB interactions. An enhanced quality image can be constructed by utilizing only the single-bounce (SB) contributions o...... hiện toàn bộ
#Image reconstruction #Scattering #Reflection #Tomography #Reflectivity #Biomedical imaging #Ultrasonic imaging #Strontium #Image segmentation #Computational Intelligence Society
High resolution segmentation of MR images of mouse heart chambers based on a partial-pixel effect and EM algorithm
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 257-260
In this paper, a high resolution segmentation method for MR images of mouse heart chambers is developed, in which the EM algorithm is adopted and extended to the spatio-temporal cardiac cycle, and a partial pixel effect (PPE) is accommodated so that the heart chambers boundary is detected to sub-pixel accuracy. The method has been tested on high and low spatial resolution images. Quantitative meas...... hiện toàn bộ
#Image resolution #Image segmentation #Mice #Heart #Spatial resolution #Area measurement #High-resolution imaging #Pixel #Testing #Biomedical imaging
A novel non-diffractive reconstruction method for digital holographic microscopy
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 625-628
We present a new method for reconstructing digitally recorded off-axis Fresnel holograms. Currently-used reconstruction methods are based on the simulation and propagation of a reference wave that is diffracted by the hologram. This procedure introduces a twin-image and a zero-order term which are inherent to the diffraction phenomenon. These terms perturb the reconstruction and limit the field of...... hiện toàn bộ
#Reconstruction algorithms #Holography #Microscopy #Image reconstruction #Diffraction #Interference #Charge coupled devices #Cameras #Biomedical measurements #Morphology
Tracking 3-D coronary artery motion with biplane angiography
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 605-608
The motion of coronary arteries has attracted increasing attention because of its possible effects on the development of atherosclerosis. Biplane angiography is the best clinical modality so far to extract this information spatially and temporally. In this paper, a new method is proposed to track 3-D coronary artery segments in biplane angiogram sequences based on a 3-D deformable model. The model...... hiện toàn bộ
#Tracking #Arteries #Angiography #Image segmentation #Deformable models #Data mining #Atherosclerosis #Bifurcation #Image reconstruction #Active contours
Model-based segmentation of cardiac and vascular images
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 22-25
Model-based approaches towards the segmentation of vascular and cardiac images are presented. For vessel segmentation, prior shape information is introduced based on the notion that vessels are elongated structures. For cardiac segmentation, shape information derived from a training set of segmented images is incorporated in an automatically constructed point distribution model of the heart.
#Image segmentation #Biomedical imaging #Active shape model #Filters #Heart #Visualization #Robustness #Deformable models #Cardiology #Image processing
Three dimensional nonlinear inversion for diffuse optical tomography
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 54-57
We show results for full three-dimensional nonlinear inversion of the parameters of a diffusive partial differential equation, specifically for an optical tomography application. We compute functional derivatives of the parameters with respect to the mean-squared error using the adjoint field method, and implement two forms of regularization. In the first, a penalty term is introduced into the err...... hiện toàn bộ
#Nonlinear optics #Tomography #Biomedical optical imaging #Optical sensors #Optical imaging #Cost function #Optical computing #Application software #Optimization methods #Radiology
Support vector machines for oral lesion classification
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 173-176
We investigate support vector machines (SVM) in the context of oral lesion classification using digital color images as input. Two common lesions of similar visual appearance to the human observer were evaluated: oral leukoplakia, which is a potentially pre-cancerous lesion, and oral lichenoid reactions (with subclasses of atrophic, plaqueformed and reticular reactions), which are usually harmless...... hiện toàn bộ
#Support vector machines #Support vector machine classification #Lesions #Color #Humans #Atrophy #Biomedical imaging #Hospitals #Risk management #Medical services
Vascular-targeted imaging using MRI
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 809-810
Target specific MRI poses special opportunities and challenges. Although MRI can provide exquisite morphologic details, its relatively low sensitivity has severely hampered the development of target-specific contrast agents that can provide enough signal alteration to be detectable in vivo. In this review, we will present our data on the development of polymerized vesicles for use in vascular-targ...... hiện toàn bộ
#Magnetic resonance imaging #Polymers #Neoplasms #Rabbits #In vivo #Payloads #Lipidomics #Spatial resolution #Vehicles #Radiology
Tái tạo chùm tia cho Micro-CT Dịch bởi AI
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 384-387
Micro-CT X-quang đã trở thành điểm nhấn trong phòng thí nghiệm CT/Micro-CT tại Đại học Iowa. Trong bài báo này, chúng tôi mô tả một số tiến bộ gần đây mà chúng tôi đã đạt được trong lĩnh vực micro-CT chùm tia hình nón. Đầu tiên, chúng tôi đề cập đến việc tái tạo xấp xỉ sử dụng các thuật toán loại Feldkamp với nhiều nguồn X-quang và cấu hình cảm biến bị lệch. Sau đó, chúng tôi giải thích ba loại ar...... hiện toàn bộ
#Image reconstruction #X-ray imaging #Lungs #Mice #Optical imaging #X-ray detection #X-ray detectors #Image resolution #Sensor arrays #Data acquisition
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