Proceedings IEEE International Symposium on Biomedical Imaging
Cơ quản chủ quản: N/A
Các bài báo tiêu biểu
Rapid MR image acquisition in the presence of background gradients
- Trang 725-728
Image acquisition in magnetic resonance imaging (MRI) is based on the application of external gradients to traverse the 2D Fourier domain of the object, known as k-space. This model holds up very well provided the underlying magnetic field is highly homogeneous, however, this is often not the case, particularly for higher field MRI. The constant component of magnetic field inhomogeneity can lead t......
#Magnetic resonance imaging #Magnetic fields #Image reconstruction #Equations #Distortion #Biomedical engineering #Spirals #Image analysis #Magnetic analysis #Image quality
An accurate segmentation method for white blood cell images
- Trang 245-248
A part of our research work on an Automated Cell Count project is described. A major requirement for this project is an efficient method to segment cell images. This work presents an accurate segmentation method for an automatic count of white blood cells. First a simple thresholding approach is applied to give initial labels to pixels in the blood cell images. The algorithm is based on priori inf......
#Image segmentation #White blood cells #Cells (biology) #Shape #Image edge detection #Laboratories #Pixel #Lighting #Morphology #Red blood cells
Vascular-targeted imaging using MRI
- 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......
#Magnetic resonance imaging #Polymers #Neoplasms #Rabbits #In vivo #Payloads #Lipidomics #Spatial resolution #Vehicles #Radiology
Time-varying sampling functions to improve dynamic magnetic resonance imaging
- Trang 721-724
In dynamic MRI, extra information can be obtained by changing the sampling function from time frame to time frame. The method "unaliasing by Fourier-encoding the overlaps using the temporal dimension" (UNFOLD) provides a way to obtain such extra information, and convert it into desirable features (e.g. increase in temporal resolution, artifact suppression). This paper focuses on UNFOLD and its app......
#Sampling methods #Magnetic resonance imaging #Spatial resolution #Image resolution #Radiology #Biomedical imaging #Hospitals #Magnetic separation #Angiography #Electronic switching systems
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
High resolution segmentation of MR images of mouse heart chambers based on a partial-pixel effect and EM algorithm
- 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......
#Image resolution #Image segmentation #Mice #Heart #Spatial resolution #Area measurement #High-resolution imaging #Pixel #Testing #Biomedical imaging
Capturing contextual dependencies in medical imagery using hierarchical multi-scale models
- Trang 165-168
In this paper we summarize our results for two classes of hierarchical multi-scale models that exploit contextual information for detection of structure in mammographic imagery. The first model, the hierarchical pyramid neural network (HPNN), is a discriminative model which is capable of integrating information either coarse-to-fine or fine-to-coarse for microcalcification and mass detection. The ......
#Biomedical imaging #Context modeling #Hip #Image analysis #Medical diagnostic imaging #Neural networks #Biomedical engineering #Image coding #Robustness #Object detection
Flows of diffeomorphisms for multimodal image registration
- Trang 753-756
We present a theoretical and computational framework for nonrigid multimodal registration. We proceed by minimization of statistical similarity criteria (global and local) in a variational framework, and use the corresponding gradients to drive a flow of diffeomorphisms allowing large deformations. This flow is introduced through a new template propagation method, by composition of small displacem......
#Image registration #Low pass filters #Robustness #Magnetic resonance imaging #Filtering #Chromium #Computational efficiency #Mutual information #Convergence #Fluid flow measurement
Mô hình không gian-thời gian và thu thập dữ liệu thích ứng với độ dư tối thiểu trong MRI động Dịch bởi AI
- Trang 737-740
Chúng tôi đề xuất hai mô hình cho hình ảnh động của tim, dựa trên sự hỗ trợ không gian và phổ thời gian của đối tượng. Các mô hình này tính đến sự không định kỳ của chuyển động tim. Các mô hình được sử dụng để thực hiện thu thập dữ liệu tối thiểu có thuộc tính tự thích ứng được tối ưu hóa cho đối tượng đang được hình ảnh hóa và để tái tạo một bộ phim với độ phân giải thời gian cao của đối tượng độ......
#Magnetic resonance imaging #Spatial resolution #Motion pictures #Image reconstruction #Image sampling #High-resolution imaging #Image resolution #Parameter estimation #Image sequences #Thyristors
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