Proceedings IEEE International Symposium on Biomedical Imaging
Cơ quản chủ quản: N/A
Các bài báo tiêu biểu
Kidney segmentation in MRI sequences using temporal dynamics
- Trang 98-101
We propose an energy-based image segmentation algorithm that uses the correlation information among pixels in the same image as well as the temporal correlation across the images in the sequence. We focus on MRI sequences that are extremely difficult to segment on the basis of single images. Our method detects motion-free objects whose intensities change across the image sequence. We introduce an ......
#Magnetic resonance imaging #Image segmentation #Change detection algorithms #Image sequences #Pixel #Object detection #Motion detection #Level set #Automatic testing #Magnetic resonance
Incorporation of diffusion tensor anisotropy in brain deformation models for updating preoperative images to improve image-guidance
- Trang 509-512
Image-guided neurosurgery requires a method for compensating for the loss in registration accuracy as the surgery progresses due to tissue deformation subsequent to craniotomy at the start of a case. Modeling methods may be able to update the preoperative scans by estimating the tissue movement as surgery progresses. For these techniques to be useful, knowledge of the intrinsic mechanical and hydr......
#Tensile stress #Anisotropic magnetoresistance #Brain modeling #Deformable models #Diffusion tensor imaging #Surgery #Neurosurgery #Mechanical factors #Computational modeling #Data mining
Hemodynamic significance of renal artery stenoses from magnetic resonance imaging
- Trang 951-954
Hemodynamically significant stenoses of the proximal renal artery reduce blood flow to the kidneys and cause result in isochemic nephropathy and hypertension. However, Conventional techniques for magnetic resonance (MR) renal artery imaging rely primarily on arterial illustration and its morphology. We propose a computational methodology to determine the functional impact of if a stenosis in the r......
#Hemodynamics #Arteries #Magnetic resonance imaging #Blood flow #Finite element methods #Magnetic resonance #Hypertension #Morphology #Angioplasty #Shape
Hướng tới một đèn pin siêu âm có tính ứng dụng lâm sàng Dịch bởi AI
- Trang 417-420
Chúng tôi đã cho thấy một phương pháp mới để kết hợp hình ảnh nhìn trực tiếp của bệnh nhân với hình ảnh siêu âm được hiển thị trong tình huống thực tế bên trong cơ thể bệnh nhân, bằng cách sử dụng một gương bán phần bạc. Chúng tôi gọi phương pháp này là Phản Chiếu Chẩn Đoán Thực Thời (RTTR). Bài báo này đánh giá tiến trình của chúng tôi cho đến nay trong việc phát triển một hình thức RTTR mà chúng......
#Optical feedback #Merging #Ultrasonic imaging #Mirrors #Tomography #Optical reflection #Acoustic reflection #Prototypes #Collaboration #Performance gain
Dual-mode ultrasound phased arrays for noninvasive surgery: post-beamforming image compounding algorithms for enhanced visualization of thermal lesions
- Trang 429-432
A post-beamforming nonlinear compounding algorithm for ultrasonic imaging is presented. Fundamental and harmonic image components from beamformed radio frequency (RF) data are extracted, envelope detected and compounded using a spatial compounding functions (SCFs) derived from the transmit/receive beamforming topology used in obtaining the RF data. This is specially useful for applications where s......
#Phased arrays #Ultrasonic imaging #Noninvasive treatment #Lesions #Radio frequency #Array signal processing #Data visualization #Data mining #Envelope detectors #Topology
2002 IEEE International Symposium on Biomedical Imaging (Cat. No.02EX608)
- 2002
Presents the title page of the proceedings record.
Reduced k-space sampling for MR images with a limited region of support
- Trang 733-736
When region of support information is available in MRI, the number of phase-encoding steps and thus time can be reduced compared to acquiring the standard rectangular grid. This reduction can be accomplished without loss of information if the k-space locations are chosen well. We propose to select locations using a rectangular sampling array that is shifted to various positions in k-space to obtai......
#Image sampling #Sampling methods #Magnetic resonance imaging #Encoding #Equations #Image reconstruction #Frequency domain analysis #Spectroscopy #Angiography #Spirals
Multiscale tumor detection and segmentation in mammograms
- Trang 213-216
Breast cancer is a leading cause of death among women. Automatic computer-aided analysis method can help radiologists to make more reliable and efficient decisions. Tumors and other abnormalities are of basic interests that need to be segmented and extracted in mammograms. In this paper, a new wavelet-packet multiscale image segmentation method is presented first. By combining this new method with......
#Tumors #Image segmentation #Wavelet packets #Gray-scale #Breast cancer #Spatial resolution #Breast neoplasms #Computer aided analysis #Discrete wavelet transforms #Reliability engineering
Support vector machine learning for detection of microcalcifications in mammograms
- Trang 201-204
Microcalcification (MC) clusters in mammograms can be an indicator of breast cancer. In this work we propose for the first time the use of support vector machine (SVM) learning for automated detection of MCs in digitized mammograms. In the proposed framework, MC detection is formulated as a supervised-learning problem and the method of SVM is employed to develop the detection algorithm. The propos......
#Support vector machines #Machine learning #Support vector machine classification #Breast cancer #Risk management #Radiology #Detection algorithms #Databases #Calcium #Breast tissue
Ray-driven analytical fan-beam SPECT reconstruction with nonuniform attenuation
- Trang 629-632
Single-photon emission computed tomography (SPECT) is based on the measurement of radiation emitted by a radiotracer injected into the patient. Because of photoelectric absorption and Compton scatter, the photons are attenuated inside the body before arriving at the detector. A quantitative reconstruction must consider the attenuation, which is usually non-uniform. Novikov and Natterer had derived......
#Attenuation #Collimators #Geometry #Computed tomography #Electromagnetic wave absorption #Electromagnetic scattering #Particle scattering #Single photon emission computed tomography #Detectors #Computer simulation