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1. (EP0377571) IMAGING PROCESS AND SYSTEM FOR TRANSILLUMINATION WITH PHOTON FREQUENCY MARKING

Office : European Patent Office
Application Number: 88905900 Application Date: 01.07.1988
Publication Number: 0377571 Publication Date: 18.07.1990
Publication Kind : B1
Designated States: DE, GB, IT, NL
Prior PCT appl.: Application Number:FR1988000356 ; Publication Number: Click to see the data
IPC:
G01N 21/17
A61B 8/00
A61B 10/00
G01H 9/00
G01J 9/04
G01N 21/47
G01N 21/59
G01N 29/00
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
17
Systems in which incident light is modified in accordance with the properties of the material investigated
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
8
Diagnosis using ultrasonic, sonic or infrasonic waves
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
10
Other methods or instruments for diagnosis, e.g. for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
G PHYSICS
01
MEASURING; TESTING
H
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
9
Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
G PHYSICS
01
MEASURING; TESTING
J
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
9
Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
04
by beating two waves of the same source but of different frequency and measuring the phase shift of the lower frequency obtained
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
17
Systems in which incident light is modified in accordance with the properties of the material investigated
47
Scattering, i.e. diffuse reflection
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
17
Systems in which incident light is modified in accordance with the properties of the material investigated
59
Transmissivity
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29
Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
CPC:
G01N 21/4795
G01J 9/04
G01N 21/1717
G01N 21/47
G01N 21/59
G01N 2021/1727
G01N 2021/178
G01S 15/8968
Applicants: GENERAL ELECTRIC CGR S.A.
Inventors: DOLFI, DANIEL
MICHERON, FRANCOIS
Priority Data: 8709461 03.07.1987 FR
Title: (DE) VERFAHREN UND VORRICHTUNG ZUR DURCHSTRAHLUNGSABBILDUNG MIT FREQUENZMARKIERTEN PHOTONEN.
(EN) IMAGING PROCESS AND SYSTEM FOR TRANSILLUMINATION WITH PHOTON FREQUENCY MARKING
(FR) PROCEDE ET SYSTEME D'IMAGERIE PAR TRANSILLUMINATION A MARQUAGE EN FREQUENCE DES PHOTONS.
Abstract: front page image
(EN) In an imaging process and system by transillumination of a medium (H) illuminated by transparency by a beam (F1), an acoustic transducer (TA1) emits an acoustic wave in the medium (H) which interferes with the beam (F1). The frequency of the light passing through the medium (H) is then shifted from the value of the frequency of the acoustic wave. A collimating device (A) whose object focus is located at the intersection of the acoustic wave and the light beam (F1) collects the light diffused by the medium (H). Application: medical imaging.
(FR) Procédé et système d'imagerie par transillumination d'un milieu (H) éclairé par transparence par un faisceau (F1). Un transducteur acoustique (TA1) émet dans le milieu (H) une onde acoustique qui interfère avec le faisceau (F1). La lumière traversant le milieu (H) a alors sa fréquence déplacée de la valeur de la fréquence de l'onde acoustique. Un dispositif de collimation (A), dont le foyer objet est placé à l'intersection de l'onde acoustique et du faisceau lumineux (F1), collecte la lumière diffusée par le milieu (H). Application: imagerie médicale.
Also published as:
US5174298FR2617602WO/1989/000278