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1. (WO2001033250) ULTRASONIC PULSE INVERSION HARMONIC SEPARATION WITH REDUCED MOTIONAL EFFECTS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/033250 International Application No.: PCT/EP2000/010098
Publication Date: 10.05.2001 International Filing Date: 12.10.2000
IPC:
A61B 8/06 (2006.01) ,A61B 8/08 (2006.01) ,G01S 7/52 (2006.01) ,G01S 15/89 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
8
Diagnosis using ultrasonic, sonic or infrasonic waves
06
Measuring blood flow
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
8
Diagnosis using ultrasonic, sonic or infrasonic waves
08
Detecting organic movements or changes, e.g. tumours, cysts, swellings
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7
Details of systems according to groups G01S13/, G01S15/, G01S17/127
52
of systems according to group G01S15/58
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
15
Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
88
Sonar systems, specially adapted for specific applications
89
for mapping or imaging
Applicants:
KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL
Inventors:
AVERKIOU, Michalakis; NL
POWERS, Jeffry, E.; NL
Agent:
LOTTIN, Claudine; Internationaal Octrooibureau B.V. Prof Holstlaan 6 NL-5656 AA Eindhoven, NL
Priority Data:
09/434,32804.11.1999US
Title (EN) ULTRASONIC PULSE INVERSION HARMONIC SEPARATION WITH REDUCED MOTIONAL EFFECTS
(FR) SEPARATION DES HARMONIQUES D'INVERSION D'IMPULSIONS ULTRASONIQUES AVEC REDUCTION DES EFFETS CINETIQUES
Abstract:
(EN) Pulse inversion harmonic separation is performed utilizing echoes from three or more pulses of alternating phase or polarity. Temporally different echoes of opposite phase or polarity are combined in pairs, which are in turn combined to form partial sums and a final sum in which fundamental frequency signal components are substantially eliminated. Preferably the signals are normalized to a common reference level. The inventive technique can be performed by a filter structure using weighting coefficients exhibiting a Gaussian variation.
(FR) Pour séparer les harmoniques d'inversions d'impulsions, on utilise les échos d'au moins trois impulsions à phase ou polarité alternative. On combine par paires les échos temporellement différents de phases ou polarités opposées, puis on combine ces paires de façon à former des sommes partielles et une somme finale d'où sont sensiblement éliminées les composantes fondamentales du signal en fréquence. De préférence, les signaux sont normalisés par rapport à un niveau de référence commun. Le procédé de l'invention convient à une structure de filtre utilisant des coefficients de pondération présentant une variation Gaussienne.
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Designated States: JP
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)