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1. WO1996004614 - FEATURE GUIDED METHOD AND APPARATUS FOR OBTAINING AN IMAGE OF AN OBJECT

Publication Number WO/1996/004614
Publication Date 15.02.1996
International Application No. PCT/US1995/009913
International Filing Date 04.08.1995
Chapter 2 Demand Filed 05.03.1996
IPC
G06T 11/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
112D image generation
CPC
G01R 33/5608
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance [NMR]
48NMR imaging systems
54Signal processing systems, e.g. using pulse sequences ; , Generation or control of pulse sequences
56Image enhancement or correction, e.g. subtraction or averaging techniques ; , e.g. improvement of signal-to-noise ratio and resolution
5608Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels
G01R 33/561
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance [NMR]
48NMR imaging systems
54Signal processing systems, e.g. using pulse sequences ; , Generation or control of pulse sequences
56Image enhancement or correction, e.g. subtraction or averaging techniques ; , e.g. improvement of signal-to-noise ratio and resolution
561by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
G01R 33/56545
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance [NMR]
48NMR imaging systems
54Signal processing systems, e.g. using pulse sequences ; , Generation or control of pulse sequences
56Image enhancement or correction, e.g. subtraction or averaging techniques ; , e.g. improvement of signal-to-noise ratio and resolution
565Correction of image distortions, e.g. due to magnetic field inhomogeneities
56545caused by finite or discrete sampling, e.g. Gibbs ringing, truncation artefacts, phase aliasing artefacts
G06T 11/005
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
112D [Two Dimensional] image generation
003Reconstruction from projections, e.g. tomography
005Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating
Applicants
  • ARCH DEVELOPMENT CORPORATION [US/US]; 1115-25 East 58th Street Chicago, IL 60637, US
Inventors
  • LEVIN, David, N.; US
Agents
  • SHEKLETON, Gerald, T. ; Welsh & Katz, Ltd. 22nd Floor 120 South Riverside Plaza Chicago, IL 60603-3913, US
Priority Data
08/286,57105.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FEATURE GUIDED METHOD AND APPARATUS FOR OBTAINING AN IMAGE OF AN OBJECT
(FR) APPAREIL ET PROCEDE REPOSANT SUR DES CARACTERISTIQUES POUR OBTENIR UNE IMAGE D'UN OBJET
Abstract
(EN)
A method and apparatus for obtaining an image from an object by acquiring training signal measurements which represent images of a plurality of training objects having at least one predetermined feature in common with the object and derive, from the training signal measurements, a set of basis functions that provide a convergent series expansion of the images. The method and apparatus determine a signal measurement prescription for the object based on the basis functions. A signal measurement acquiring device is controlled to acquire signal measurements of the object as determined by the signal measurement prescription. A truncated basis function expansion of the image is generated from the acquired signal measurements. Estimates of additional signal measurements are carried out based on the truncated basis function expansion. The image is reconstructed using the obtained signal measurements and the estimated additional signal measurements. The training signals may also be generated synthetically without the use of training objects.
(FR)
L'invention concerne un procédé et un appareil pour obtenir une image d'un objet, par l'acquisition de mesures de signaux d'apprentissage qui représentent les images d'une pluralité d'objets d'apprentissage ayant en commun avec l'objet au moins une caractéristique prédéterminée. L'appareil utilise les mesures des signaux d'apprentissage pour obtenir une série de fonctions de base permettant une expansion sérielle convergente des images. Le procédé et l'appareil permettent de déterminer une prescription des mesures des signaux pour l'objet, basée sur les fonctions de base. On prévoit un dispositif d'acquisition des mesures des signaux, conçu pour acquérir les mesures des signaux de l'objet conformément à la prescription des mesures des signaux. On effectue une expansion tronquée des fonctions de base de l'image à partir des mesures des signaux acquis. On effectue des estimations des mesures des signaux additionnels sur la base de l'expansion tronquée des fonctions de base. L'image est reconstitué à l'aide des mesures des signaux obtenues et des mesures des signaux additionnels estimées. Les signaux d'apprentissage peuvent également être produits par synthèse sans que des objets d'apprentissage soient utilisés.
Also published as
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