NDLI: An algorithm for recovering the absorption coefficient from reflected light using a discrete diffusion model

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1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record

Proceedings of 1994 IEEE Nuclear Science Symposium - NSS'94

Volume 4 - 1994

Image reconstruction for a novel SPECT system with rotating slant-hole collimators

Backprojection filtering for variable orbit fan beam tomography

Software for evaluating image reconstruction algorithms

Hybrid deformable models for three-dimensional biomedical image segmentation

Factor analysis for quantitation of myocardial blood flow (MBF) using /sup 13/N-ammonia dynamic PET imaging

A filtered-backprojection algorithm for astigmatic SPECT reconstruction

Estimation of tumor activities from simulated I-123 SPECT studies

Uniform quadratic penalties cause nonuniform spatial resolution

Evaluation of the effect of reconstructed image pixel size on defect detectability in Tl-201 fan-beam SPECT by an observer performance study

Absolute cerebral blood flow with /sup 15/O-water and PET: determination without a measured input function

Effects of nonuniform collimator sensitivity on variance of attenuation-corrected SPECT images

Positron emission mammography (PEM): a promising technique for detecting breast cancer

Pinhole SPECT for imaging In-111 in the head

First results from a prototype PET scanner using BaF/sub 2/ scintillator and photosensitive wire chambers

Increased sensitivity through use of overlapping 180/spl deg/ orbits in clinical myocardial perfusion imaging

Evaluation of volume imaging with the HEAD PENN-PET scanner

Scintillator crystal readout with wavelength-shifting optical fibers

Comparison of the beveled-edge and reach-through APD structures for PET applications

A GSO(Ce) block type detector for high count rate PET applications

An algorithm for recovering the absorption coefficient from reflected light using a discrete diffusion model

Coronary angiogram video compression

An application of convolution neural networks: reducing false-positives in lung nodule detection

Correction of cross-talk noise in high energy X-ray computed tomography

Multiple signal source localization from spatio-temporal magnetocardiogram

Neural networks based segmentation of magnetic resonance images

A new method for multimodal 3-D image registration with external markers

Surface reconstruction from volume data used for creating an adaptable functional brain atlas

Semi-automatic brain morphometry in CT

Time-evolution analysis of differential features on 3D surfaces of the heart walls

Extraction of rounded and line objects for the improvement of medical image pattern recognition

Automated contour extraction using a multi-scale approach

Unsupervised Bayesian segmentation with bootstrap sampling application to eye fundus image coding

Adaptive segmented attenuation correction for whole-body PET imaging

Direct measurement of resolution in volumetric imaging systems

The effects of collimation on image formation in Anger gamma cameras

Calibration and correction of a modular cylindrical SPECT system (McSPECT-II)

Design studies of a depth encoding large aperture PET camera

Evaluation of a cone-beam SPECT system for brain imaging

CMOS readout electronics for an emission-transmission medical imaging system

Development of an emission-transmission CT system combining X-ray CT and SPECT

Attenuation correction of cardiac perfusion images in SPECT using Compton scatter data: a Monte Carlo investigation

Simultaneous transmission/emission imaging for SPECT using energy spectrum fitting

Reduction of truncation artifacts in fan-beam transmission imaging using a spatially varying gamma prior

Using linear time-invariant system theory to estimate kinetic parameters directly from projection measurements

Evaluation of ejection fraction measurements in gated cardiac imaging using dynamic cardiac phantoms

Basal ganglia phantom simulation: improvement of relative quantitation in SPECT [I-123] dynamic neuroreceptor imaging

Heterogeneity of SPECT bull's-eyes in normal dogs: comparison of attenuation compensation algorithms

Three-dimensional correction of experimentally determined gamma camera response

What can SPECT learn from autoradiography?

An extended completeness condition for exact cone-beam reconstruction and its application

Image reconstruction from projections using a genetic algorithm

Absolute radionuclide concentration measurement using maximum likelihood expectation maximization iterative reconstruction, attenuation and scatter correction

A comparative study of the effects of using higher order mechanical priors in SPECT reconstruction

Monte Carlo simulation of gated SPECT cardiac blood pool studies

A proposal of a Monte Carlo method using octree structure [SPECT application]

Monte Carlo simulation of high count rate scintillation camera imaging

Image registration of MR and PET based on surface matching and principal axes fitting

On-line monitoring and PET imaging of proton radiotherapy beams

Design study of future 3-D PET systems

Development of continuous detectors for a high resolution animal PET system

NECR analysis of 3D brain PET scanner designs

A compact position-sensitive detector for PET

A hybrid real-time UNIX controller for the Donner 600-crystal positron tomograph

A hybrid attenuation correction technique to compensate for lung density in 3D total body PET

Compensation methods for head motion detected during PET scans

An analysis of correction methods for emission contamination in PET post-injection transmission measurement

Modeling of 2D PET noise autocovariance function applied to individual activation studies

Energy and position dependence of scatter functions in high resolution PET

A comparison of 3D scatter correction methods in a neuroPET tomograph

Effect of scatter from radioactivity outside of the field of view in 3D PET

A model for multiple scatters in fully 3D PET

Simultaneous hyperparameter estimation and Bayesian image reconstruction for PET

Combination of Wiener filtering and singular value decomposition filtering for volume imaging PET

Image reconstruction of radical prostatectomy specimens using a three dimensional reconstruction algorithm

Energy window optimization in simultaneous SPECT(Tl-201)/TCT(Tc-99m) data acquisition

A comparison of Gd-153 and Co-57 as transmission sources for simultaneous TCT and Tl-201 SPECT

Performance evaluation of a transmission reconstruction algorithm with simultaneous transmission-emission SPECT system in a presence of data truncation

The use of X-ray CT for attenuation correction of PET data

Detailed investigation of transmission and emission data smoothing protocols and their effects on emission images

Reduction of truncation artifacts in fan beam transmission by using parallel beam emission data

An investigation of dual-energy transmission measurements for more accurate non-uniform attenuation compensation in cardiac SPECT

Experimental evaluation of a tellurium-123m transmission source to determine attenuation maps for SPECT

Combining functional MRI and EEG source imaging

Adaptive entropy coded DCT coding of magnetic resonance image sequences

Monte Carlo calculation of X-ray spectra emitted by various anode materials at low voltages

Separation of veins from activated brain tissue in functional magnetic resonance images at 1.5 T

Segmentation of 3D brain MR using an adaptive K-means clustering algorithm

RF front end for a 4.1 Tesla clinical NMR spectrometer

Three-dimensional image analysis of blood vessels using cone-beam CT

Noise reduction in the dual energy window scatter correction approach in 3D PET

Simultaneous Tc-99m/Tl-201 imaging using energy-based estimation of the spatial distributions of contaminant photons

A Monte Carlo correction for Compton scattering effects in 3D PET brain imaging

Scatter corrections for simultaneously acquired dual-isotope SPECT imaging using three windows

Singles attenuation correction in positron tomography

The scatter background in high-resolution pinhole SPECT

Volume 3 - 1994

Volume 2 - 1994

Volume 1 - 1994

1993 IEEE Conference Record Nuclear Science Symposium and Medical Imaging Conference

IEEE Conference on Nuclear Science Symposium and Medical Imaging

Conference Record of the 1991 IEEE Nuclear Science Symposium and Medical Imaging Conference

1990 IEEE Nuclear Science Symposium Conference Record

An algorithm for recovering the absorption coefficient from reflected light using a discrete diffusion model

Content Provider	IEEE Xplore Digital Library
Author	Maritz, M.F. Herman, G.T. Yee, C.
Copyright Year	1994
Abstract	An algorithm based on a discrete model for photon migration is proposed for recovering the absorption coefficient in a semi-infinite slab. A pulsed light source is modelled and only reflected signals are used in the reconstruction. It is assumed that the diffusion coefficient and the speed of light are both constant and known. The algorithm is based on the fact that the earliest reflected signals obtained from a particular voxel depend either linearly or quadratically on the absorption coefficient in that voxel. By solving the discrete model in the forward direction in a region where the absorption coefficient has been calculated already, the absorption coefficients in the voxels on the boundary of the region can be calculated using interpolation. Results show that simple absorptive regions can be accurately recovered.
Starting Page	1852
Ending Page	1856
File Size	347300
Page Count	5
File Format	PDF
ISBN	0780325443
DOI	10.1109/NSSMIC.1994.474704
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-10-30
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Absorption Slabs Tomography Finite difference methods Image reconstruction Surface reconstruction Light sources Interpolation Humans Light scattering
Content Type	Text
Resource Type	Article

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