WO2012065600A2 - Procédé et dispositif d'oculographie en cas de vertiges - Google Patents

Procédé et dispositif d'oculographie en cas de vertiges Download PDF

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Publication number
WO2012065600A2
WO2012065600A2 PCT/DE2011/002000 DE2011002000W WO2012065600A2 WO 2012065600 A2 WO2012065600 A2 WO 2012065600A2 DE 2011002000 W DE2011002000 W DE 2011002000W WO 2012065600 A2 WO2012065600 A2 WO 2012065600A2
Authority
WO
WIPO (PCT)
Prior art keywords
person
head
movements
camera
acceleration
Prior art date
Application number
PCT/DE2011/002000
Other languages
German (de)
English (en)
Other versions
WO2012065600A3 (fr
Inventor
Christoph Maurer
Original Assignee
Universitätsklinikum Freiburg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universitätsklinikum Freiburg filed Critical Universitätsklinikum Freiburg
Publication of WO2012065600A2 publication Critical patent/WO2012065600A2/fr
Publication of WO2012065600A3 publication Critical patent/WO2012065600A3/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/40—Detecting, measuring or recording for evaluating the nervous system
    • A61B5/4005—Detecting, measuring or recording for evaluating the nervous system for evaluating the sensory system
    • A61B5/4023—Evaluating sense of balance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1113—Local tracking of patients, e.g. in a hospital or private home
    • A61B5/1114—Tracking parts of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1126—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb using a particular sensing technique
    • A61B5/1128—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb using a particular sensing technique using image analysis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/113—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining or recording eye movement

Definitions

  • the invention is based on a method and a device for oculography in dizziness.
  • Dizziness is a disturbance of a person's sense of balance or balance. It can have different causes. These include, for example, deficits of the peripheral organ of balance and the balance nerves, central disorders in stroke or brain tumor, inflammatory diseases of the central nervous system, traumatic brain injury, epilepsy, cardiovascular diseases, infections, intoxications and metabolic disorders such as diabetes mellitus or mental illness ,
  • the diagnosis of systematic dizziness is based on certain pathological eye movements called nystagmus. For this purpose, the eye or eye movements of a person consisting mainly of fixations, eye movements and saccades are recorded and recorded. This is called oculography.
  • Known devices and methods for dizziness diagnostics are expensive.
  • the devices have a first means for moving a person, such as a multi-axis rotatable swivel chair or a movable platform, and second means for detecting the eye movements of the person during movement by means of the first means.
  • the first device can bring about a change of position of the person's body and, on the other hand, trigger the occurrence of dizziness symptoms.
  • At a change of position at least portions of the body are moved so that the position and / or the
  • CONFIRMATION COPY Alignment of at least one body part changes.
  • the eye movements of the person with a change of position of her body provide information about the presence and the type of dizziness.
  • Such elaborate devices are usually present only in larger clinics or special hospitals, which have a specialist in Dizziness diagnostics department with appropriately trained and experienced professionals to evaluate the investigation. To perform a diagnostic examination in such a medical facility, the person concerned must make an appointment.
  • the disadvantage here is that dizziness symptoms fluctuate and those affected by dizziness
  • the invention has for its object to provide a device and a method for oculography in case of dizziness, which allow a person affected by dizziness to perform even certain investigative steps always when the dizziness is just occurring.
  • the method according to the invention is characterized in that the movement of the head triggered by the position change and the eye movements of the person triggered by the position change are detected by means of a manually executable device during a change of position of a person.
  • the device is equipped with a camera and with position and / or acceleration sensors. It is free of fastening devices, which serve the fixed arrangement of the device to the body of the person.
  • the Camera is so aligned by the person or another person on the head of the person to be examined that on the imager of the camera, the eye area of the face and an environment of the head is displayed.
  • a movement of the head relative to the environment of the head and an eye movement are detected.
  • the position and / or acceleration sensors By means of the position and / or acceleration sensors, the change in the position, the speed and / or the acceleration of the device is determined. As a result, a movement of the device in space can be determined.
  • the movements of the cameras equipped with the camera can be used.
  • Device can be distinguished from the movements of the head and the eye movements in the captured data of the camera.
  • the result of the evaluation are thus the movements of the eye, which are independent of the movement of the device, which provide information about systematic vertigo forms.
  • the movements of the head relative to its surroundings and the movement of the eyes relative to its surroundings are first determined from the images taken with the camera.
  • the device in a position change substantially the movement of the
  • Head so resting the head essentially in the pictures taken with the camera, while the environment of the head, especially the background moves. Such a movement is also a movement of the head relative to its environment or background.
  • the detection of the head and eye movements from the images can be done in particular by means of image processing. If the head and eye movements are determined from the images of the camera, the data determined by means of the position and / or acceleration sensors relating to a change in the position and / or the speed and / or the acceleration of the device are taken into account in the evaluation. The resulting from the change of position and / or speed and / or acceleration movement of the device is with that of the Images of the camera captured movement of the head compared.
  • the device has essentially followed the movement of the head or has been moved in a different way. If the movements deviate from one another, this is compensated during the evaluation. A relative movement between the device and the head of the person does not falsify the result of the evaluation. A movement of the device relative to the head is therefore not critical. Therefore, a strong connection between the device and the person's head can be dispensed with.
  • the device is free from any fastening device serving such a fixed connection. Such fastening devices are known
  • a person can hold the device in his hand and align it with his head. It does not require the help or assistance of another person to carry out the procedure. This greatly facilitates the conduct of the procedure and an examination for certain forms of dizziness.
  • the person can carry the device equipped with a camera, with position and / or acceleration sensors and carry out the procedure precisely when the dizziness symptoms occur.
  • a correlation between the occurrence of dizziness symptoms on the one hand and the recording of eye movements with simultaneous change of position of the body of the person is thus given.
  • the number of false or undiagnosed vertigo forms is thereby reduced.
  • the movements of the head and / or the eye movements are determined by means of image processing from the acquired data. This takes place during the evaluation of the data determined by the camera. This evaluation can be done either by means of an integrated into the device evaluation or by means of an external
  • the eyes are recognized in a captured image of the camera and the movement of the eyes, especially of the pupils relative to the eye environment.
  • the changes in position of the person to be performed are specified.
  • the person receives a specification regarding the change of position to be carried out by her, for example, laying down the upper body or the entire body, tilting the head or turning the head.
  • Device determines the actual position change of the person. This can be compared with a predetermined change of position.
  • the movements of the head and the eye movements are detected with an infrared camera.
  • the movements of the person's body and their eye movements can be determined from the thermal image generated by the infrared camera. This allows the body to change its position in the dark and to detect the eye movements in the dark. This has the advantage that the person with a change of position with their eyes can fix any object in the room.
  • Eye movements can thus be detected without the person being distracted by objects or persons, and without that Eye movement is distorted by viewing these objects or persons. It can additionally be a lighting with an infrared light source, such as an infrared LED.
  • the device according to the invention with the features of claim 7 is characterized in that it is equipped with a small and handy housing that can hold a person during the occurrence of dizziness symptoms in the hand and guide and align by hand, so that in the housing integrated camera is aimed at the eyes of the person. It is thus a portable device with a small and handy housing.
  • the camera is designed so that it can detect movements of the head relative to the surroundings or the background and movements of the eyes relative to the surroundings of the eyes from a distance to the head of the person, which is given by the arm length of the person.
  • the housing is equipped with acceleration sensors and / or position sensors which detect the position and / or the speed and / or the acceleration of the device.
  • the device has a memory device in which the data acquired with the camera and the position and / or memory sensors are stored. Finally, the device has an interface via which the acquired data of the camera and the data of the acceleration sensors and / or position sensors can be output to an integrated or external evaluation device. If the evaluation device is integrated in the device, then the evaluation of the acquired data can take place directly in the device. If it is an external evaluation device, the evaluation of the acquired data takes place outside the device.
  • the evaluation device can also consist of several parts. In this case, a first part of the evaluation device can be integrated into the device and a second part can be arranged outside the device.
  • the evaluation of the images taken with the camera for detecting a movement of the head relative to its environment and for detecting the eye movements by a first part of the evaluation done which is integrated into the device.
  • the evaluation of these movements taking into account the change in the position and / or the speed and / or the acceleration of the device can be carried out in a second part of the evaluation, which is arranged externally.
  • the movements of the head relative to its surroundings and the movement of the eyes relative to its surroundings are first determined from the images taken with the camera. Subsequently, in the further evaluation, the data determined by means of the position and / or acceleration sensors relating to a change in the position and / or the speed and / or the acceleration of the device are taken into account in the evaluation.
  • the movement of the device resulting from the change in position and / or speed and / or acceleration is compared with the movement of the head detected from the images of the camera. It follows that the device has essentially followed the movement of the head or has been moved in a different way. If the movements deviate from one another, this is compensated during the evaluation.
  • a relative movement between the device and the head of the person does not falsify the result of the evaluation. Therefore, a strong connection between the device and the person's head can be dispensed with.
  • the device is free from any fastening device serving such a fixed connection. The person can hold the device in his hand and aim it at her face. This greatly facilitates the conduct of the procedure and an examination for certain forms of dizziness.
  • the subject preferably receives an instruction as to how to hold the device.
  • a distance between the camera and the eyes of the person between 20 and 40 cm is suitable.
  • a camera can detect the movements of both eyes and a movement of the head relative to its surroundings.
  • the instruction concerning the holding and guiding of the device can be stored in a memory direction of the device stored and issued to the person acoustically and / or visually.
  • the device may be equipped with a loudspeaker and / or a display device.
  • instructions stored on a person in relation to a position change of the body are stored on a storage device arranged in the housing.
  • the eye movements of a person with a change of position of her body provide information about dizziness.
  • the output device may be a loudspeaker and / or a display device.
  • the output device may be identical to the above-mentioned output device which issues instructions regarding the correct handling and alignment of the device to the user.
  • the instructions relating to a movement to change position are audibly and / or visually displayed to the person.
  • Such an instruction may be, for example, the request that
  • the eye movements of the person are received by a camera disposed in the housing of the device.
  • the movements which bring about a change of position are those which can be carried out without aids or at most with simple aids existing in the person.
  • the camera can have, for example, a CCD or a CMOS module as an image generator.
  • the movement of the eyes relative to their surroundings is preferably detected from the recorded images by means of image processing.
  • the device can either itself be equipped with an image processing device or be connected via an interface with an external image processing device.
  • the device is furthermore equipped with a plurality of acceleration sensors and / or position sensors arranged in the housing, which sensors Motion and / or detect the position of the device in space.
  • acceleration sensors and / or position sensors are necessary in order to detect the movement and / or the position in three dimensions.
  • the acceleration sensors are based on the principle of measuring the deflection of a test mass under the effect of acceleration. Acceleration sensors, like the position sensors, are inertial sensors. Acceleration sensors are also known as accelerometers or accelerometers. Systems with multiple accelerometers and position sensors are known from inertial heading and attitude reference systems and video oculography systems. Based on the measured accelerations and positions in different spatial directions, the movements and / or the position of the device in space are determined.
  • the device is furthermore equipped with an interface via which the acquired data is output to an external evaluation device.
  • the evaluation device compares the acquired data with data relating to the movements of the movements and changes of position relating to the eye movements. Based on the eye movements, a statement can be made regarding the nature and extent of the dizziness. The person is informed about the result of the evaluation. If it results from the evaluation that the movements for changing the position have not been carried out correctly or the device has not been held and guided correctly, then the person may be requested to carry out a test again. If an investigation has led to a successful evaluation, the result of the evaluation is output to the person. The person may then discuss the result with their physician for appropriate therapy.
  • the device according to the invention has the advantage that the person affected by dizziness can himself carry out a relevant test without her needing additional aids or assistance in addition to the device.
  • a device for moving the body of the person as at known devices is not necessary. This results in the person being able to perform the test whenever the dizziness occurs.
  • the person can carry out the movements concerning the change of position of their body and the recording of their eye movements themselves on the basis of the device. This significantly improves and simplifies the diagnosis of dizziness.
  • a correlation between the occurrence of dizziness symptoms on the one hand and the recording of eye movements with simultaneous change of position of the body of the person is given. The number of false or undiagnosed vertigo forms is thereby reduced.
  • the apparatus design for performing the test is much lower than in known devices, since the dizziness does not have to be triggered only by an additional device such as a swivel chair or a movable platform. This considerably reduces the effort involved in carrying out the test.
  • the device can be designed as a self-contained and self-contained device which serves exclusively the purpose of oculography in the case of instructions based change of position of the body.
  • the device may be part of a portable and handy device, such as a mobile phone.
  • components of the mobile phone such as the output device and the memory device may be used by the device.
  • the device is equipped with an image processing device, which consists of the through
  • Camera captured data determines the movement of the eyes relative to their environment.
  • the detection of the eye movements from the images or image information recorded by means of the camera can already take place in the device itself.
  • acceleration sensors and / or position sensors yaw rate sensors and / or gyroscopes.
  • Such sensors are known from inertial systems.
  • the camera is an infrared camera.
  • This allows the body to change its position in the dark and to detect the eye movements in the dark.
  • the eye movements can be detected as a thermal image with the infrared camera.
  • the device may additionally be equipped with an infrared LED for illumination.

Abstract

L'invention concerne un procédé et un dispositif d'oculographie en cas de vertiges chez une personne. Le dispositif est portable et il est équipé d'une caméra et de capteurs d'accélération et/ou de capteurs de position. Il ne comporte pas d'équipement de fixation servant fixer le dispositif sur la tête d'une personne. La caméra permet de détecter les mouvements de la tête de la personne relativement à l'environnement de la tête, ces mouvements étant provoqués par le changement de position de la personne. La caméra permet en outre de détecter les mouvements des yeux de la personne relativement à l'environnement immédiat des yeux, ces mouvements étant provoqués par le changement de position de la personne. De plus, les capteurs d'accélération et/ou de position permettent de détecter une modification de la position et/ou de la vitesse et/ou de l'accélération du dispositif pendant la détection du mouvement de la tête et des mouvements des yeux. Les mouvements des yeux sont déterminés et analysés sur la base de la détection des mouvements de la tête, des mouvements des yeux et des modifications de la position et/ou de la vitesse et/ou de l'accélération du dispositif.
PCT/DE2011/002000 2010-11-17 2011-11-17 Procédé et dispositif d'oculographie en cas de vertiges WO2012065600A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010051462.4 2010-11-17
DE102010051462 2010-11-17

Publications (2)

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WO2012065600A2 true WO2012065600A2 (fr) 2012-05-24
WO2012065600A3 WO2012065600A3 (fr) 2012-08-30

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DE (1) DE102011118764A1 (fr)
WO (1) WO2012065600A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10426379B2 (en) 2015-03-30 2019-10-01 Natus Medical Incorporated Vestibular testing apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT524365A1 (de) * 2020-10-20 2022-05-15 Vertify Gmbh Verfahren für die Zuweisung eines Schwindelpatienten zu einem medizinischen Fachgebiet

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050110950A1 (en) * 2003-03-13 2005-05-26 Thorpe William P. Saccadic motion sensing
US7731360B2 (en) * 2003-11-07 2010-06-08 Neuro Kinetics Portable video oculography system
WO2009072264A1 (fr) * 2007-12-03 2009-06-11 Panasonic Corporation Dispositif de traitement d'image, dispositif de photographie, dispositif de reproduction, circuit intégré, et procédé de traitement d'image

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10426379B2 (en) 2015-03-30 2019-10-01 Natus Medical Incorporated Vestibular testing apparatus

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Publication number Publication date
WO2012065600A3 (fr) 2012-08-30
DE102011118764A1 (de) 2012-05-24

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