Proceedings IEEE International Symposium on Biomedical Imaging
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Các bài báo tiêu biểu
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
On the effectiveness of doubly adaptive estimation for dynamic MRI sequence acquisitions
- Trang 959-962
We present experimentally-acquired MR image sequence reconstruction results and
a review of the recently proposed doubly adaptive temporal update method (DATUM)
for the acquisition of dynamic MRI sequences. The DATUM algorithm is novel in
providing an estimation and tracking framework for both image reconstruction and
the image acquisition inputs. We discuss the difficulty in choosing viable
syste...
#Adaptive estimation #Magnetic resonance imaging #Image reconstruction #Data acquisition #Spatial resolution #Hospitals #Biomedical imaging #Radiology #Image sequences #Production systems
Chiến lược toàn cầu để tự động trích xuất thông tin tưới máu phụ có liên quan: ứng dụng vào hình ảnh NMR cơ xương với nhãn sinh mạch Dịch bởi AI
- Trang 569-572
Bài báo này mô tả một chiến lược toàn cầu trong xử lý hình ảnh để tự động trích
xuất thông tin tưới máu, khi thông tin này không phải là thông tin chính trong
chuỗi hình ảnh. Nó được áp dụng cho các nghiên cứu tưới máu MR của cơ xương,
được thực hiện với các chuỗi nhãn sinh mạch. Đầu tiên, các hình ảnh động được
đăng ký, sau đó các phương pháp dựa trên phân tích yếu tố được áp dụng để phân
biệt gi...
#Data mining #Muscles #Labeling #Image analysis #Biomedical monitoring #Magnetic resonance imaging #Tagging #Image segmentation #Nuclear magnetic resonance #Motion estimation
Micro-SPECT Dịch bởi AI
- Trang 373-376
Sử dụng một loạt các chế phẩm phóng xạ có sẵn và điều tra, cùng với thiết bị
tương đối rẻ tiền, chụp cắt lớp phát xạ đơn photon (SPECT) cung cấp một công cụ
hữu ích để thu thập thông tin chức năng giá trị trong cơ thể sống (in vivo). Bị
giới hạn bởi việc sử dụng hệ thống chấn lưu bằng chì, SPECT lâm sàng có hiệu
suất phát hiện thấp hơn nhiều và độ phân giải không gian kém hơn, dẫn đến chất
lượng h...
#Spatial resolution #Collimators #Positron emission tomography #Instruments #Computed tomography #In vivo #Image quality #Animal structures #Isotopes #Apertures
Improvement of the SNR-resolution compromise in MRA using spatial segmented k-space acquisitions
- Trang 947-950
A method is proposed to reconstruct Magnetic Resonance Angiography (MRA) volumes
from successive acquisitions. A specific set up of the MR system is used to
acquire highly anisotropic MRA volumes with reduced k-space coverage. These
partial k-spaces are then combined to obtain a 3D k-space fitted to the
frequency support of the angiographic image. This allows us to improve the
SNR-resolution compr...
#Spatial resolution #Image reconstruction #Image segmentation #Degradation #Magnetic resonance imaging #Signal to noise ratio #Magnetic resonance #Angiography #Anisotropic magnetoresistance #Filling
Optical Doppler coherence tomography algorithms: quantitative analysis
- Trang 293-296
We present, to our knowledge, the first quantitative comparisons of five flow
estimation algorithms for optical Doppler coherent tomography. We have used
simulated 1D, 2D, and in vivo blood flow data to investigate the estimation
accuracy and sensitivity of these algorithms. We introduce, among these five
methods, 3 new algorithms: weighted centroid, sliding-window filtering, and
autocorrelation. ...
#Tomography #Algorithm design and analysis #Optical filters #Optical sensors #Filtering algorithms #Autocorrelation #Image motion analysis #In vivo #Blood flow #Adaptive filters
A shape reconstruction method for diffuse optical tomography using a transport model and level sets
- Trang 1015-1018
A two-step shape reconstruction method for diffuse optical tomography (DOT) is
presented which uses adjoint fields and level sets. The propagation of
near-infrared photons in tissue is modeled by the time-dependent linear
transport equation, of which the absorption parameter has to be reconstructed
from boundary measurements. In the shape reconstruction approach, it is assumed
that the inhomogeneo...
#Shape #Reconstruction algorithms #Tomography #Level set #Nonlinear optics #Absorption #US Department of Transportation #Optical propagation #Equations #Inverse problems
A new convergent MAP reconstruction algorithm for emission tomography using ordered subsets and separable surrogates
- Trang 409-412
We investigate a new, fast and provably convergent MAP reconstruction algorithm
for emission tomography. The new algorithm, termed C-OSEM has its origin in the
alternating algorithm derivation of the well known EM algorithm for emission
tomography. In this re-derivation, the complete data explicitly enters the
objective function as an unknown variable. While the entire complete data gets
updated i...
#Reconstruction algorithms #Tomography #Image reconstruction #Smoothing methods #Bayesian methods #Cost function #Biomedical imaging #Radiology #Physics #Data models
Classifying convex sets for vessel detection in retinal images
- Trang 269-272
We present a method to detect vessels in images of the retina. Instead of
relying on pixel classification, as many detection algorithms do, we propose a
more natural representation for elongated structures, such as vessels. This new
representation consists of primitives called affine convex sets. On these convex
sets we apply the classification step. The reason for choosing this approach is
two-fo...
#Retina #Eigenvalues and eigenfunctions #Image edge detection #Pixel #Reflection #Diabetes #Retinopathy #Performance evaluation #Kernel
A statistical model for cryo electron microscope images and 3-D reconstruction and experimental design [spherical viruses]
- Trang 673-676
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