Proceedings IEEE International Symposium on Biomedical Imaging
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Image quality evaluation of flat panel detector binning in x-ray fluoroscopy
- Trang 177-180
Pixel-binning is used in flat-panel (FP) x-ray detectors for fluoroscopy to increase signal-to-noise ratio (SNR) and lower digital data rates. In this study, we quantitatively assessed image quality of image sequences acquired with and without binning using a clinically relevant task of detecting the tip of a guidewire. Detection was evaluated at two exposures and at two different orientations wit......
#Image quality #X-ray detection #X-ray detectors #X-ray imaging #Image sequences #Pixel #Signal to noise ratio #Degradation #Thin film transistors #Biomedical engineering
Giải quyết các phương trình của chụp ảnh tomografi có điều kiện Dịch bởi AI
- Trang 653-656
Việc hoãn lại quá trình phân rã có thể đôi khi thay đổi cách nhìn của chúng ta về các vấn đề hình ảnh. Để minh họa, chúng tôi cung cấp một cách tiếp cận lại đối với chụp ảnh tomografi có điều kiện (CT) trong đó hệ phương trình lớn liên thông cho hình ảnh mượt mà chưa biết được tách thành nhiều phương trình nhỏ hơn và đơn giản hơn, mỗi phương trình cho một phép chiếu riêng biệt. Do đó, CT có điều k......
#Computed tomography #X-ray imaging #Robot kinematics #Medical robotics #Image analysis #Background noise #Laplace equations #Biomedical imaging #Information technology #Smoothing methods
List mode reconstruction for PET with motion compensation: a simulation study
- Trang 413-416
Motion artifacts can be a significant factor that limits the image quality in high-resolution PET. Surveillance systems have been developed to track the movements of the subject during a scan. Development of reconstruction algorithms that are able to compensate for the subject motion will increase the potential of PET. In this paper we present a list mode likelihood reconstruction algorithm with t......
#Positron emission tomography #Motion compensation #Image reconstruction #Reconstruction algorithms #Computer simulation #Image quality #Surveillance #Tracking #Detectors #Event detection
An integrated confocal and magnetic resonance microscope for observing living cells
- Trang 801-804
We have combined a confocal fluorescence optical microscope and a magnetic resonance microscope into one instrument to image simultaneously a living cell system. The high spatial resolution confocal and high spectral resolution magnetic resonance microscope produces a set of closely linked, complementary images. To enhance the value of this image set, we have also developed a statistical method, l......
#Magnetic resonance #Magnetic force microscopy #Optical microscopy #Spatial resolution #Instruments #Image resolution #Predictive models #Fluorescence #Statistical analysis #Calibration
3D reconstruction of 2D crystals from projections in real space
- Trang 689-692
A new algorithm for 3D reconstruction of two-dimensional crystals from projections is presented, and applied to biological macromolecules imaged using electron microscopy. Its main departure from the traditional approach is that it works in real space, rather than in Fourier space, and is iterative. This approach has the advantage of making it convenient to introduce additional constraints (such a......
#Crystals #Image reconstruction #Transmission electron microscopy #Crystallization #Lattices #Iterative methods #Electron microscopy #Fourier transforms #Iterative algorithms #Molecular biophysics
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......
#Modal analysis #Arteries #Frequency #Ultrasonic variables measurement #Acoustic imaging #Deformable models #Acoustic waves #Acoustic propagation #Optical propagation #Rubber
Design of minimally invasive optical imaging probes to track vascular gene expression: a Monte Carlo simulation analysis
- Trang 285-288
A Monte Carlo simulation analysis of optical probe design for minimally invasive tracking of gene expression in the vasculature was performed. The simulations based on efficient light delivery for excitation of green fluorescent protein (GFP) marker revealed the possibility of using percutaneous probes and intravascular probes to detect gene expression in the vessel walls. A percutaneous probe of ......
#Optical design #Minimally invasive surgery #Optical imaging #Probes #Gene expression #Monte Carlo methods #Optical scattering #Biomedical optical imaging #Optical attenuators #Fluorescence
Generalized series dynamic imaging with deformable references [MRI application]
- Trang 789-792
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......
#High-resolution imaging #Spatial resolution #Encoding #Image reconstruction #Image coding #Spline #Application software #Image resolution #Deformable models #Solid modeling
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
Image reconstruction without multiple-bounce ghosting artifacts
- Trang 1001-1004
Develops an innovative image reconstruction technique for reflection tomography based upon the extraction of multiple-bounce (MB) ghosting artifacts. The basic concept is that the time-of-flight between the transmission and reception of a waveform includes the realistic effects of MB interactions. An enhanced quality image can be constructed by utilizing only the single-bounce (SB) contributions o......
#Image reconstruction #Scattering #Reflection #Tomography #Reflectivity #Biomedical imaging #Ultrasonic imaging #Strontium #Image segmentation #Computational Intelligence Society