Proceedings IEEE International Symposium on Biomedical Imaging
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Diffusion tensor model based smoothing
- Trang 705-708
We provide a unified framework for smoothing noisy brain image data along attributes of choice derived from diffusion tensor imaging. The framework is based on a variational segmentation functional approach that outputs smoothed regions within the white matter that are relatively homogeneous with respect to specific diffusion tensor image properties. The smoothed tensor fields and the associated e...... hiện toàn bộ
#Tensile stress #Smoothing methods #Diffusion tensor imaging #Brain #Image segmentation #Magnetic resonance imaging #Feature extraction #Humans #Data visualization #Anisotropic magnetoresistance
Image reconstruction of reflectivity from short scan data
- Trang 1027-1030
In reflectivity tomography, a weakly reflecting object that is immersed in an acoustically homogeneous background medium is interrogated with an infinitesimally short ultrasonic pulse and the corresponding reflected signal is measured at the source location as a function of time. The goal of reflectivity tomography is to reconstruct a function that describes the reflectivity of an inhomogeneous ob...... hiện toàn bộ
#Image reconstruction #Reflectivity #Tomography #Pulse measurements #Ultrasonic variables measurement #Position measurement #Acoustic pulses #Acoustic measurements #Time measurement #Reconstruction algorithms
Hình ảnh cộng hưởng từ giải phẫu, chức năng và phân tử trong kỷ nguyên hậu gen Dịch bởi AI
- Trang 709-712
Trong thập kỷ qua, đã có những tiến bộ nhanh chóng trong việc phát triển các kỹ thuật hình ảnh cộng hưởng từ (MRI) cung cấp thông tin giải phẫu, chức năng và phân tử cụ thể. Song song với những phát triển này, có sự tiến bộ to lớn trong di truyền phân tử, đã tạo ra các công cụ mạnh mẽ cho việc hiểu và thao tác cơ sở di truyền của chức năng tế bào và mô. Hiện nay, đang có sự quan tâm ngày càng tăng...... hiện toàn bộ
#Magnetic resonance imaging #Mice #Genetics #Humans #Animals #Genomics #Bioinformatics #Magnets #Gene expression #In vitro
An efficient implementation of the channelized Hotelling observer for task-based assessment of lossy compressed images
- Trang 82-85
An efficient subband implementation of the channelized Hotelling observer is presented, which can be used to assess the image quality of images compressed with wavelet-based techniques. The channelized Hotelling model observer has been shown to predict human performance in detecting signals in noise-limited images. The model observer can also predict degradation of human performance due to lossy c...... hiện toàn bộ
#Image coding #Humans #Image quality #Predictive models #Medical signal detection #Signal detection #Degradation #Performance loss #Biomedical imaging #Mean square error methods
Development of hybrid NIR/MRI imaging system algorithm: use of a-priori information for tumor detection in the female breast
- Trang 657-660
The use of dual modality MRI and near infrared (NIR) optical tomography is under investigation. It will be shown in this work that accurate structural a-priori knowledge from the MRI image, together with appropriate constraints on the image reconstruction can yield useful and accurate images of internal optical property distributions and that this should help in identifying anomalies within the br...... hiện toàn bộ
#Magnetic resonance imaging #Neoplasms #Optical scattering #Breast #Biomedical optical imaging #Optical modulation #Tomography #Optical imaging #Infrared detectors #Image reconstruction
Hình ảnh quang học chụp cắt lớp gần hồng ngoại của các mô chứa dịch Dịch bởi AI
- Trang 70-73
Trong những năm gần đây, hình ảnh chụp cắt lớp quang học gần hồng ngoại (OTI) đã có những bước tiến lớn trong việc trở thành một phương pháp chẩn đoán hình ảnh y khoa có ý nghĩa lâm sàng. Hình ảnh hóa các biến động động trong các thông số của máu, hình ảnh não chức năng và hình ảnh tuyến vú là những lĩnh vực ứng dụng tiên tiến nhất của kỹ thuật mới này. Trong nghiên cứu này, chúng tôi tập trung và...... hiện toàn bộ
#Infrared imaging #Tomography #Optical imaging #Optical scattering #Amniotic fluid #Biomedical optical imaging #Image reconstruction #Biomedical imaging #Fluid dynamics #Blood
Extended-FOV magnetic resonance imaging with table translation and frequency cycling
- Trang 955-958
A new method for MR imaging of an extended field-of-view (FOV) has been developed and validated. The method employs concurrent MR data acquisition and continuous table motion. Interference of motion to image formation is removed by sweeping the center frequency of the receiver at a rate matching the table's speed. Multiple regional images are collected and combined to reconstruct the full FOV. The...... hiện toàn bộ
#Magnetic resonance imaging #Frequency #Image reconstruction #Encoding #Robustness #Data acquisition #Interference #Anatomy #Image segmentation #Coils
Isolating the cardiac blood pool position for use as a marker of heart position in free-breathing MRI examinations
- Trang 939-942
Chest motion due to patient breathing can give rise to artifacts during conventional cardiac examinations by Magnetic Resonance Imaging (MRI). Typically, patients are asked to hold their breath during MRI exams to alleviate this problem. However, this can be difficult for sick patients and children, and has also been shown to affect physiology. This article outlines an approach to isolate the posi...... hiện toàn bộ
#Blood #Heart #Magnetic resonance imaging #Navigation #Pediatrics #Tracking #Laboratories #Physiology #Uncertainty #Spatial resolution
Quantitative image processing of 3D biological structures
- Trang 388-391
With recent advances in genetics and molecular medicine there is a strong need for quantitative image processing of three-dimensional (3D) biological structures. A number of new microstructural imaging modalities have been put forward recently allowing phenotypic quantification with high precision and accuracy in humans and animals, especially in the mouse. Although biomedical imaging technology i...... hiện toàn bộ
#Image processing #Biomedical imaging #Osteoporosis #Bones #Animal structures #Genetics #Humans #Mice #Image analysis #Information analysis
Vibro-acoustography for modal analysis of arterial vessels
- Trang 513-516
In order to apply vibro-acoustography for imaging of arteries, a theoretical model of vibro-acoustics of thick arterial vessels is presented. The arterial wall is modeled with the first order shear deformation theory. The fluids outside and inside the artery are modeled with acoustic wave theory. The coupled vibration of arterial tubes is analyzed with the wave propagation approach. The experiment...... hiện toàn bộ
#Modal analysis #Arteries #Frequency #Ultrasonic variables measurement #Acoustic imaging #Deformable models #Acoustic waves #Acoustic propagation #Optical propagation #Rubber