ASSESSMENT OF AN ATTENTIONAL DEFICIT

• US 20160171696A1
• Filed: 12/08/2015
• Published: 06/16/2016
• Est. Priority Date: 12/16/2014
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips N.V.
• Inventors: KLAMING, Laura, VAN MINDE, Daisy, GILLIES, Murray Fulton
• Granted Patent: US 9,978,145 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 3/113 for determining or recording eye movement
• CPC Class Codes: A61B 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/163 by tracking eye movement, gaze, or pupil change
• CPC Class Codes: A61B 5/168 Evaluating attention deficit, hyperactivity
• CPC Class Codes: G06F 3/012 Head tracking input arrangements
• CPC Class Codes: G06T 2207/30041 Eye; Retina; Ophthalmic
• CPC Class Codes: G06T 2207/30201 Face
• CPC Class Codes: G06T 7/0016 involving temporal comparison
• CPC Class Codes: G06T 7/60 Analysis of geometric attributes
• CPC Class Codes: G06V 40/166 using acquisition arrangements
• CPC Class Codes: G06V 40/168 Feature extraction; Face representation
• CPC Class Codes: G06V 40/172 Classification, e.g. identification
• CPC Class Codes: G06V 40/193 Preprocessing; Feature extraction
• CPC Class Codes: G16H 10/20 for electronic clinical trials or questionnaires
• CPC Class Codes: G16H 20/70 relating to mental therapies, e.g. psychological therapy or autogenous training
• CPC Class Codes: G16H 50/20 for computer-aided diagnosis, e.g. based on medical expert systems

Abstract

A system and method are provided for use in the assessment of an attentional deficit. During the assessment, a test image is presented to a subject on a display. A camera image is obtained from a camera which is indicative of a geometric relation between the head of the subject and the display during the assessment. The camera image is analyzed to determine a deviation in the geometric relation between the head of the subject and the display from a reference geometric relation. Deviation data is then generated and output which is indicative of the deviation. Advantageous uses of the deviation data include providing visual feedback to the user, adjusting the test image, and taking the deviation into account when processing test data of the assessment. Advantageously, the need for a trained professional to be present during the assessment is reduced or avoided.

Claims

1. A system for use in an assessment of an attentional deficit, comprising:

a user interaction subsystem connectable to a display for presenting a test image to a subject as part of the assessment;

a camera for obtaining a camera image indicative of a geometric relation between the head of the subject and the display during the assessment;

an analysis subsystem for analyzing the camera image to determine a deviation in the geometric relation between the head of the subject and the display from a reference geometric relation; and

a data interface for outputting deviation data indicative of the deviation to enable compensating for the deviation in the assessment.

2. The system according to claim 1, wherein the user interaction subsystem comprises a display processor for generating an output image for being presented on the display the output image being generated based on the test image and the deviation data.

3. The system according to claim 2, wherein the display processor is configured for including a visual feedback element in the output image indicating whether the deviation is below or above a predetermined deviation threshold.

4. The system according to claim 3, wherein the display processor is configured for generating the visual feedback element to be indicative of a direction in which the head of the subject is to be repositioned and/or reoriented so as to reduce the deviation.

5. The system according to claim 3, wherein the display processor is configured for generating the visual feedback element in or as a border around the test image.

6. The system according to claim 2, wherein the display processor is configured for adjusting the test image as presented in the output image so as to account for the deviation in the geometric relation between the head of the subject and the display.

7. The system according to claim 6, wherein the display processor is configured for adjusting the test image by rotating and/or translating the test image.

8. The system according to claim 1, wherein the user interaction subsystem is configured for recording test data representing user input obtained from the subject during the assessment, and wherein the data interface is configured for storing the deviation data as metadata to the test data.

9. The system according to claim 8, further comprising an evaluation subsystem for processing the test data based on the deviation data to account for the deviation in the geometric relation between the head of the subject and the display in the test data.

10. The system according to claim 8, wherein the user interaction subsystem is configured for recording timing information as part of the test data, the timing information representing a reaction time of the subject during the assessment.

11. The system according to claim 8, wherein the analysis subsystem is configured for analyzing the camera image to determine gaze points of the subject with respect to the display, and wherein the user interaction subsystem is configured for recording gaze information as part of the test data.

12. The system according to claim 1, wherein the analysis subsystem is configured for applying a face recognition technique to the camera image to verify an identity of the subject participating in the assessment.

13. Tablet device comprising the system according to claim 1.

14. A method for use in an assessment of an attentional deficit, comprising:

using a display, presenting a test image to a subject as part of the assessment;

obtaining a camera image indicative of a geometric relation between the head of the subject and the display during the assessment;

analyzing the camera image to determine a deviation in the geometric relation between the head of the subject and the display from a reference geometric relation; and

outputting deviation data indicative of the deviation to enable compensating for the deviation in the assessment.

15. A computer program product comprising instructions for causing a processor system to perform the method according to claim 14.