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1. WO2007092054 - METHOD AND APPARATUS TO VISUALIZE THE CORONARY ARTERIES USING ULTRASOUND

Publication Number WO/2007/092054
Publication Date 16.08.2007
International Application No. PCT/US2006/035995
International Filing Date 14.09.2006
IPC
A61B 8/14 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
13Tomography
14Echo-tomography
CPC
A61B 5/02007
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
02007Evaluating blood vessel condition, e.g. elasticity, compliance
A61B 5/7257
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
72Signal processing specially adapted for physiological signals or for diagnostic purposes
7235Details of waveform analysis
7253characterised by using transforms
7257using Fourier transforms
A61B 5/7264
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
72Signal processing specially adapted for physiological signals or for diagnostic purposes
7235Details of waveform analysis
7264Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems
A61B 8/06
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
06Measuring blood flow
A61B 8/08
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
08Detecting organic movements or changes, e.g. tumours, cysts, swellings
A61B 8/0883
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
08Detecting organic movements or changes, e.g. tumours, cysts, swellings
0883for diagnosis of the heart
Applicants
  • SPECHT, Donald, F. [US]/[US]
Inventors
  • SPECHT, Donald, F.
Agents
  • STAINBROOK, Craig, M.
Priority Data
60/765,88706.02.2006US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS TO VISUALIZE THE CORONARY ARTERIES USING ULTRASOUND
(FR) procEDE et appareil permettant de visualiser les artEres coronaires A l'aide d'ultrasons
Abstract
(EN)
A non-invasive screening technique for visualizing coronary arteries which overcomes the problems of visualizing the curved arteries by projecting the three dimensional volume of the arteries onto a two dimensional screen. Blood filled areas, and in particular, the coronary arteries and veins, are highlighted to contrast them with other nearby tissues using non-linear classification and segmentation techniques. Data is gathered as a sequence of 2D slices stored as a 3D volume. Software is employed to interpolate voxels intermediate to the slices. Wiener filtering or LMS spatial filtering can be implemented on each 2D scan to improve lateral resolution and reduce noise prior to the use of the scan data with the classification and segmentation algorithms. A traditional handheld ultrasound probe is employed to enable the technician to locate the area of interest, but a gyroscopic stabilizer is added to minimize unwanted variation on two axes of rotation while scanning through angles on the third axis of rotation.
(FR)
La présente invention concerne une technique non invasive de dépistage destinée à visualiser les artères coronaires, surmontant les problèmes de visualisation des artères courbées en projetant le volume tridimensionnel des artères sur un écran bidimensionnel. Les zones remplies de sang et, en particulier, les artères et veines coronaires, sont mises en évidence pour contraster avec d'autres tissus avoisinants en utilisant des techniques de classification et segmentation non linéaires. Des données sont rassemblées sous forme d'une séquence de tranches en 2D stockées sous forme d'un volume en 3D. Un logiciel est utilisé pour interpoler des voxels entre les tranches. Un filtrage de Wiener ou un filtrage spatial LMS peut être mis en œuvre sur chaque balayage en 2D pour améliorer la résolution latérale et réduire le bruit avant d'utiliser les données de balayage avec les algorithmes de classification et de segmentation. Une sonde à ultrasons manuelle classique est utilisée pour permettre que le technicien localise la zone d'intérêt, mais un stabilisateur gyroscopique est ajouté pour réduire la variation non souhaitée sur deux axes de rotation tout en balayant selon des angles sur le troisième axe de rotation.
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