Proceedings IEEE International Symposium on Biomedical Imaging

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Fast, iterative, field-corrected image reconstruction for MRI
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 489-492
B.P. Sutton, D.C. Noll, J.A. Fessler
Magnetic field inhomogeneities cause distortions in the reconstructed images for non-cartesian k-space MRI (using spirals, for example). Several noniterative methods are currently used to compensate for the off-resonance during the reconstruction, but these methods rely on the assumption of a smoothly varying field map. Recently, iterative methods have been proposed that do not rely on this assump...... hiện toàn bộ
#Image reconstruction #Magnetic resonance imaging #Iterative methods #Spirals #Reconstruction algorithms #Equations #Fast Fourier transforms #Phase estimation #Image segmentation #Iterative algorithms
Generalized series dynamic imaging with deformable references [MRI application]
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 789-792
Xiuquan Ji, Zhi-Pei Liang
Many imaging applications require the acquisition of a time series of images. Conventional full-scan methods acquire each of these images independently, resulting in a tradeoff between spatial resolution and temporal resolution. To address this problem, a generalized series-based reduced-encoding method has been proposed, which collects one or a few high-resolution references and a sequence of red...... hiện toàn bộ
#High-resolution imaging #Spatial resolution #Encoding #Image reconstruction #Image coding #Spline #Application software #Image resolution #Deformable models #Solid modeling
2002 IEEE International Symposium On Biomedical Imaging [front matter]
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang i-xxxi - 2002
Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the ori...... hiện toàn bộ
Một quy trình hiệu chuẩn hoàn toàn tự động cho siêu âm 3D bằng tay Dịch bởi AI
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 985-988
F. Rousseau, P. Hellier, C. Barillot
Bài báo này mô tả một phương pháp mới cho việc hiệu chuẩn siêu âm ba chiều (3D) bằng tay. Một cảm biến vị trí được gắn trên một đầu dò siêu âm thông thường, do đó tập hợp các B-scan có thể được định vị trong không gian 3D và có thể được kết hợp thành một thể tích. Quy trình hiệu chuẩn nhằm xác định phép biến đổi (dịch chuyển, xoay, và tỷ lệ) giữa hệ tọa độ của hình ảnh và hệ tọa độ của hệ thống đị...... hiện toàn bộ
#Hiệu chuẩn #Hình ảnh siêu âm #Đầu dò #Tái cấu trúc hình ảnh #Mô phỏng hình ảnh #Hệ thống cơ học #Ma trận pha #Tái cấu trúc bề mặt Thuật toán lặp #Hình ảnh y sinh
Classifying convex sets for vessel detection in retinal images
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 269-272
J. Staal, S.N. Kalitzin, M.D. Abramoff, T. Berendschot, B. van Ginneken, M.A. Viergever
We present a method to detect vessels in images of the retina. Instead of relying on pixel classification, as many detection algorithms do, we propose a more natural representation for elongated structures, such as vessels. This new representation consists of primitives called affine convex sets. On these convex sets we apply the classification step. The reason for choosing this approach is two-fo...... hiện toàn bộ
#Retina #Eigenvalues and eigenfunctions #Image edge detection #Pixel #Reflection #Diabetes #Retinopathy #Performance evaluation #Kernel
Towards high performance small animal positron emission tomography
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 369-372
M.V. Green, J. Seidel, C.A. Johnson, J.J. Vaquero, J. Pascau, M. Desco
During the last decade increasingly sophisticated positron emission tomography (PET) scanners have been developed for imaging small laboratory animals. These systems often exhibit performance characteristics, e.g. spatial resolution, substantially better than contemporary human PET scanners and are often the first systems to demonstrate new technologies, e.g. avalanche photodiode-based detector mo...... hiện toàn bộ
#Animals #Positron emission tomography #Spatial resolution #Laboratories #High-resolution imaging #Humans #Detectors #Image resolution #Mice #Electrons
Cardiac ultrasound motion detection by elastic registration exploiting temporal coherence
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 585-588
M.J. Ledesma-Carbayo, J. Kybic, M. Suhling, P. Hunziker, M. Desco, A. Santos, M. Unser
We propose a new global registration method for estimating the cardiac displacement field in 2D sequences of ultrasound images of the heart. The basic idea is to select a reference frame (e.g., the first image of a cycle) and to map each image in the sequence to it using elastic deformation. What makes our method specific is the use of a semi-local parametric model of the deformation (spatio-tempo...... hiện toàn bộ
#Ultrasonic imaging #Motion detection #Spline #Heart #Parametric statistics #Optimization methods #Displacement control #Noise robustness #Testing #Deformable models
In-vivo micro-CT for small animals imaging
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 377-380
A. Sasov
Recent developments in in-vivo small animal imaging are based on the demand from the biological and pharmaceutical researchers for the high-resolution and high throughput micro-CT instruments. Two in-vivo micro-CT scanners has been developed: a research grade high-resolution scanner with isotropic 8 /spl mu/m voxel size in any location of 80 mm /spl times/ 200 mm animal's body and an ultra-fast fu...... hiện toàn bộ
#Animals #Image reconstruction #X-ray imaging #Geometry #High-resolution imaging #Instruments #Throughput #X-ray scattering #Cameras #X-ray detection
Automatic lesion detection and volume measurement in MR imaging of plexiform neurofibromas
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 229-232
J. Solomon, B. Widemann, K. Warren, F. Balis, N. Patronas
Conventional response criteria (RECIST, WHO) are inadequate for plexiform neurofibromas (IN) due to their size and complex shapes. An automated method was developed to detect and quantify the volume of PN on STIR MR images. The automated algorithm implements heuristics derived from human-based recognition of lesions (pixel intensity contrast and edge detection/following). A connected component ana...... hiện toàn bộ
#Lesions #Volume measurement #Neoplasms #Clinical trials #Image edge detection #Solids #Diseases #Oncology #Radiology #Shape
Intelligent segmentation tools
Proceedings IEEE International Symposium on Biomedical Imaging - - Trang 217-220
W.A. Barrett, L.J. Reese, E.N. Mortensen
Intelligent Scissors and Intelligent Paint are complementary interactive image segmentation tools that allow a user to quickly and accurately select objects of interest using simple gesture motions with a mouse. With Intelligent Scissors, when the cursor position comes in proximity to an object edge, a live-wire boundary "snaps" to, and wraps around the object of interest. The Intelligent Paint to...... hiện toàn bộ
#Image segmentation #Paints #Active contours #Competitive intelligence #Mice #Robustness #Feedback #Lifting equipment #Labeling #Data mining
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