Now showing items 1-10 of 16
Sufficient Condition for Local Invertibility of Spatio-Temporal 4D B-Spline Deformations
(IEEE, 2010-04-14)
Recent advances in medical imaging technologies have made 4D image sequences available in clinical routine. As a consequence, image registration techniques are evolving from alignment of pairs of static volumetric images ...
Joint Estimation of Image and Fieldmap in Parallel MRI Using Single-Shot Acquisitions
(IEEE, 2010-04-14)
We propose a method for joint reconstruction of dynamic images and fieldmaps in parallel MRI, using single-shot trajectories. We exploit the sensitivity encoding from parallel imaging to reduce the length of acquisition ...
Regularized reconstruction in quantitative SPECT using CT side information from hybrid imaging
(2010-05)
A penalized-likelihood (PL) SPECT reconstruction method using a modified regularizer that accounts for anatomical boundary side information was implemented to achieve accurate estimates of both the total target activity ...
Joint Estimation of Stokes Images and Aberrations from Phase-Diverse Polarimetric Measurements
(Optical Society of America, 2010-04-30)
The technique of phase diversity has been used in traditional incoherent imaging systems to jointly estimate an object and optical system aberrations. This paper extends the technique of phase diversity to polarimetric ...
Accuracy Estimation for Projection-to-Volume Targeting during Rotational Therapy: A Feasibility Study
(American Association of Physicists in Medicine, 2010-05-10)
Purpose: Estimating motion and deformation parameters from a series of projection radiographs
acquired during arc therapy using a reference CT volume has become a promising technique for
targeting treatment. The purpose ...
Frequency-domain analysis of photoacoustic imaging data from prostate adenocarcinoma tumors in a murine model
(Elsevier, 2011-05)
Photoacoustic imaging is an emerging technique for anatomical and functional sub-surface imaging, but previous studies have predominantly focused on time-domain analysis. In this study, frequency-domain analysis of the ...
Regularized Image Reconstruction Algorithms for Dual-Isotope Myocardial Perfusion SPECT (MPS) Imaging Using a Cross-Tracer Prior
(IEEE, 2010-10-14)
In simultaneous dual-isotope myocardial perfusion SPECT (MPS) imaging, data are simultaneously acquired to determine the distributions of two radioactive isotopes. The goal of this work was to develop penalized maximum ...
Model-Based Image Reconstruction for MRI
(IEEE, 2010-06-14)
Magnetic resonance imaging (MRI) is a sophisticated and versatile medical imaging modality. The inverse FFT has served the MR community very well as the conventional image reconstruction method for k-space data with full ...
Optimization Transfer Approach to Joint Registration / Reconstruction for Motion-Compensated Image Reconstruction
(IEEE, 2010-04-14)
Motion artifacts in image reconstruction problems can be reduced by performing image motion estimation and image reconstruction jointly using a penalized-likelihood cost function. However, updating the motion parameters ...
In Vivo Characterization of Pancreatic and Lymph Node Tissue using Endoscopic Ultrasound Spectrum Analysis: Validation Study
(Elsevier, 2010-01)
Background—Quantitative spectral analysis of the radio-frequency (RF) signals that underlie grayscale EUS images can be used to provide additional, objective information about tissue state.
Objective—Our purpose was to ...