Proceedings IEEE International Symposium on Biomedical Imaging
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Predicting the success of a radiopharmaceutical for in vivo imaging
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Summary form only given. This presentation focuses on gathering the critical preclinical data and other steps required to optimize the characteristics of a potential new radioligand for use in vivo. It is based on a critical review of successful and unsuccessful radiopharmaceuticals developed in our center and elsewhere over many years. Included among the factors to be considered for predicting th...... hiện toàn bộ
#In vivo #Biomedical imaging #Stability #Radioactive materials #Proteins #Density measurement #Humans
A statistical model for cryo electron microscope images and 3-D reconstruction and experimental design [spherical viruses]
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A statistical model for cryo electron microscope images is described. 3-D reconstruction and experimental design methods based on the model are demonstrated. Advantages of this approach to 3-D reconstruction include that minimal prior information, only particle symmetry and radii, is required.
#Electron microscopy #Three dimensional displays #Design for experiments #Viruses (medical) #Image reconstruction #Particle scattering #Fourier transforms #Design engineering #Signal reconstruction #Proteins
Covariance-driven retinal image registration initialized from small sets of landmark correspondences
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An automatic retinal image registration algorithm would be an important tool for detecting visible changes in the retina caused by the progress of a disease or by the impact of a treatment. Developing such an algorithm is difficult, especially for feature-poor images of diseased eyes. In this paper, a new retinal image registration algorithm is described that bootstraps an estimate of the paramete...... hiện toàn bộ
#Retina #Image registration #Diseases #Parameter estimation #Cameras #Eyes #Switches #Pixel #Computer science #Indexing
Super-resolution in MRI
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In 2D multislice MRI, the resolution in the slice direction is often worse than the in-plane resolution. For certain diagnostic imaging applications, isotropic resolution is necessary but true 3D acquisition methods are not practical. In this case, if the imaging volume is acquired two or more times, with small spatial shifts between acquisitions, combination of the data sets using an iterative su...... hiện toàn bộ
#Magnetic resonance imaging #Spatial resolution #Image resolution #Signal resolution #High-resolution imaging #Radio frequency #Biomedical imaging #Encoding #Timing #Iterative algorithms
Phương pháp đảo ngược để xác định mô đun đàn hồi trong mô bằng cách sử dụng chụp cộng hưởng từ đàn hồi Dịch bởi AI
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Phương pháp được gọi là chụp cộng hưởng từ đàn hồi (MRE) cho phép đo trực tiếp sự biến đổi đàn hồi trong các vật liệu chịu tác động của rung động cưỡng bức. Thêm vào đó, những biến đổi này liên quan đến các tham số của vật liệu thông qua các phương trình đàn hồi. Trong bài báo này, chúng tôi trình bày ngắn gọn một phương pháp để xác định các mô đun đàn hồi (tức là các thành phần của tensor Hooke) ...... hiện toàn bộ
#Magnetic resonance #Magnetic materials #Vibration measurement #Biological materials #Equations #Elasticity #Displacement measurement #Force measurement #Tensile stress #Anisotropic magnetoresistance
Image reconstruction of reflectivity from short scan data
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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
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
Vibro-acoustography for modal analysis of arterial vessels
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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
Synchrotron radiation coronary microangiography in isolated perfused rat heart for evaluation of coronary vascular response
- Trang 561-564
Visualization of vasoconstriction and vasodilatation of coronary arteries with vasoactive agents is a useful research tool for evaluation of coronary vascular reserve. Microangiography with spatial resolution in the micrometer range was carried out to depict coronary vascular response in a rat heart under Langendorff perfusion using a high-speed imaging system and a third generation synchrotron ra...... hiện toàn bộ
#Synchrotron radiation #Heart #Optical imaging #X-ray imaging #Visualization #Arteries #High-resolution imaging #Spatial resolution #X-ray detection #X-ray detectors
Reducing the Gibbs ringing artifact in MRI scans while maintaining tissue boundary integrity
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Gibbs ringing is a well known artifact that effects reconstruction of images having discontinuities. This is a problem in the reconstruction of magnetic resonance imaging (MRI) data due to the many different tissues normally present in each scan. The Gibbs ringing artifact manifests itself at the boundaries of the tissues, making it difficult to determine the structure of the brain tissue. The Geg...... hiện toàn bộ
#Magnetic resonance imaging #Image reconstruction #Image edge detection #Reconstruction algorithms #Mathematics #Alzheimer's disease #Frequency #Magnetic separation #Imaging phantoms #Brain