Proceedings IEEE International Symposium on Biomedical Imaging
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Các bài báo tiêu biểu
Spectrum analysis of microwave breast examination data and reconstructed images
- Trang 62-65
A broadband microwave tomographic imaging system is being developed for breast
cancer detection which exploits the significant electrical property contrast
between normal and malignant tissue. The improved image reconstruction algorithm
directly processes the log-magnitude and phase values of the measured fields
with the frequency rich data set being utilized to acquire the absolute
scattered phas...
#Image analysis #Image reconstruction #Tomography #Microwave imaging #Breast cancer #Cancer detection #Frequency measurement #Phase measurement #Scattering #Wrapping
Partial non-Fourier encoded MRI
- Trang 729-732
MRI is by nature a Fourier encoded imaging modality. But MRI is enriched and
made all the more powerful and flexible by the fact that it also includes
elements of non-Fourier encoding, such as slice selection. Our goal is to
develop a partial non-Fourier encoding methodology that is fully integrated
with, and is complementary to, existing MR encoding approaches. The word
'partial' is used to empha...
#Magnetic resonance imaging #Encoding #Radio frequency #Vectors #Data acquisition #Protocols #Fourier transforms #Radiology #Biomedical imaging #Hospitals
Reconstruction algorithm for single circular orbit cone beam scans
- Trang 836-838
With the recent introduction of multi-slice CT (MCT) many reconstruction
algorithms have been proposed. These algorithms take advantage of the available
conjugate samples in the multi-slice configuration and estimate a set of
projections at the predefined plane-of-reconstruction (POR). In many clinical
applications, however, the step-and-shoot scan mode becomes increasingly
important. For these ap...
#Reconstruction algorithms #Image reconstruction #Computed tomography #Detectors #Synthetic aperture sonar #Data acquisition #Geometry #Spatial resolution #Extrapolation #Biomedical imaging
Intra-operative 3D ultrasound augmentation
- Trang 421-424
We introduce an automated and accurate system for registering pre-operative 3D
MR and CT images with intraoperative 3D ultrasound images based on the vessels
visible in both. The clinical goal is to guide the radio-frequency ablation
(RFA) of liver lesions using percutaneous ultrasound even when the lesions are
not directly visible using ultrasound. The lesions locations and desired RFA
sites are ...
#Ultrasonic imaging #Lesions #Computed tomography #Needles #Liver #Computer displays #Radio frequency #Libraries #Biomedical imaging #Three dimensional displays
Tái tạo chùm tia cho Micro-CT Dịch bởi AI
- Trang 384-387
Micro-CT X-quang đã trở thành điểm nhấn trong phòng thí nghiệm CT/Micro-CT tại
Đại học Iowa. Trong bài báo này, chúng tôi mô tả một số tiến bộ gần đây mà chúng
tôi đã đạt được trong lĩnh vực micro-CT chùm tia hình nón. Đầu tiên, chúng tôi
đề cập đến việc tái tạo xấp xỉ sử dụng các thuật toán loại Feldkamp với nhiều
nguồn X-quang và cấu hình cảm biến bị lệch. Sau đó, chúng tôi giải thích ba loại
ar...
#Image reconstruction #X-ray imaging #Lungs #Mice #Optical imaging #X-ray detection #X-ray detectors #Image resolution #Sensor arrays #Data acquisition
Prostate surface segmentation from 3D ultrasound images
- Trang 613-616
Segmenting, or outlining, the prostate boundary is a very important task in
diagnosing and treating cancer. In this paper, an algorithm is described for
semiautomatic segmentation of the prostate from 3D ultrasound images. The
algorithm uses model-based initialization and mesh refinement using an efficient
deformable model. Initialization requires the user to select only six points
from which the ...
#Image segmentation #Ultrasonic imaging #Deformable models #Cancer #Shape #Image processing #Image edge detection #Visualization #Ellipsoids #Biomedical engineering
MRI signal reconstruction by Fourier frames on interleaving spirals
- Trang 717-720
Interleaving spirals are a natural setting for attaining fast MRI signal
reconstruction. Using the results of Beurling and Landau, as well as
quantitative coverings of the spectral domain by translations of the polar set
of the target disk space E, harmonics for Fourier frames F are constructed on
interleaving spirals to reconstruct signals on E. Because of the weak Fourier
frame bound estimates b...
#Magnetic resonance imaging #Signal reconstruction #Interleaved codes #Spirals #Image reconstruction #Fourier transforms #Differential equations #Nuclear magnetic resonance #Mathematics #Educational institutions
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...
#Magnetic resonance imaging #Neoplasms #Optical scattering #Breast #Biomedical optical imaging #Optical modulation #Tomography #Optical imaging #Infrared detectors #Image reconstruction
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...
#Magnetic resonance imaging #Frequency #Image reconstruction #Encoding #Robustness #Data acquisition #Interference #Anatomy #Image segmentation #Coils
Automated cryo-electron microscopy
- Trang 741-744
Cryo-electron microscopy is widely viewed as a uniquely powerful method for the
study of membrane proteins and large macromolecular complexes - subjects that
are viewed as extremely challenging or impossible to study using x-ray or NMR
methods. Although the methodology of molecular microscopy has enormous
potential, it is time consuming and labor intensive. Our group has done
extensive work to aut...
#Proteins #Electron microscopy #Image resolution #Image analysis #Assembly #Ice #Image reconstruction #Data analysis #Biomembranes #X-ray imaging