Patent ID: 9400923
Filing Date: 2016-07-26
CPC Classification: A61M,G06K

Claim Text:
1. A patient interface identification system for identifying a patient interface that is suited for a face of a user, comprising: a processor structure for receiving a test picture including the face of the user; a database storing reference pictures including faces of other users, wherein each reference picture is referenced to a patient interface advice including information about a patient interface that is suited for the face imaged in said particular reference picture; a processor unit structured for comparing the received test picture with at least a subset of said reference pictures stored in the database, wherein comparing said test picture with said subset of reference pictures includes a comparison of image based features of the user's face and the other users' faces; and a user interface structured for communicating a patient interface advice including information related to a patient interface that is suited for the face of the user, which patient interface advice is based on the comparison of said test picture with the subset of reference pictures stored in the database, and wherein the comparison of said image based features of the user's face and the other users' faces includes: (a) a determination of an angle ratio or a distance ratio between anatomical landmarks within the test picture and the reference pictures and a comparison of said angle ratio or distance ratio in the test picture with the corresponding angle ratio or distance ratio in each of the subset of reference pictures, or (b) a determination of intensity gradients at predetermined positions with respect to anatomical landmarks within the test picture and the reference pictures and a comparison of said intensity gradients in the test picture with the corresponding intensity gradients in each of the subset of reference pictures.