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[Image analysis system for detection facial paralysis]. 2001

B H Suchy, and S R Wolf, and A Gebhard, and D Paulus
Klinik und Poliklinik für Hals-, Nasen- und Ohrenkranke, F.-A.-Universität Erlangen-Nürnberg, Waldstrasse 1, 91054 Erlangen. bernhard.suchy@rzmail.uni-erlangen.de

BACKGROUND Evaluation of facial nerve paresis depends on visual assessment and naturally differs from examiner to examiner. An objective measurement instrument is presented. METHODS Facial features are automatically localized by a parametric face model in videos of a face during relaxation and exercises. Gray-level information is analyzed by a special steerable filter and used to identify symmetries. The computer system was tested in 19 individuals. RESULTS Automatic localization of facial features such as the upper arc of the head and ears was correct in 95%, the eyes in 82%, and the mouth in 73%. Lid paresis was correctly recognized in seven of ten (70%) and oral paresis in 10 of 12 (83%) cases. Unaffected eyelid movements were identified in eight of nine (89%) and healthy oral regions in all seven (100%) cases. CONCLUSIONS The computer system presented is able to automatically localize facial features and to identify facial nerve paresis. It is a considerable step toward automatic and objective grading of facial nerve paresis.

UI MeSH Term Description Entries
D007091 Image Processing, Computer-Assisted A technique of inputting two-dimensional or three-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer. Biomedical Image Processing,Computer-Assisted Image Processing,Digital Image Processing,Image Analysis, Computer-Assisted,Image Reconstruction,Medical Image Processing,Analysis, Computer-Assisted Image,Computer-Assisted Image Analysis,Computer Assisted Image Analysis,Computer Assisted Image Processing,Computer-Assisted Image Analyses,Image Analyses, Computer-Assisted,Image Analysis, Computer Assisted,Image Processing, Biomedical,Image Processing, Computer Assisted,Image Processing, Digital,Image Processing, Medical,Image Processings, Medical,Image Reconstructions,Medical Image Processings,Processing, Biomedical Image,Processing, Digital Image,Processing, Medical Image,Processings, Digital Image,Processings, Medical Image,Reconstruction, Image,Reconstructions, Image
D003936 Diagnosis, Computer-Assisted Application of computer programs designed to assist the physician in solving a diagnostic problem. Computer-Assisted Diagnosis,Computer Assisted Diagnosis,Computer-Assisted Diagnoses,Diagnoses, Computer-Assisted,Diagnosis, Computer Assisted
D005149 Facial Expression Observable changes of expression in the face in response to emotional stimuli. Face Expression,Expression, Face,Expression, Facial,Face Expressions,Facial Expressions
D005158 Facial Paralysis Severe or complete loss of facial muscle motor function. This condition may result from central or peripheral lesions. Damage to CNS motor pathways from the cerebral cortex to the facial nuclei in the pons leads to facial weakness that generally spares the forehead muscles. FACIAL NERVE DISEASES generally results in generalized hemifacial weakness. NEUROMUSCULAR JUNCTION DISEASES and MUSCULAR DISEASES may also cause facial paralysis or paresis. Facial Palsy,Hemifacial Paralysis,Facial Palsy, Lower Motor Neuron,Facial Palsy, Upper Motor Neuron,Facial Paralysis, Central,Facial Paralysis, Peripheral,Facial Paresis,Lower Motor Neuron Facial Palsy,Upper Motor Neuron Facial Palsy,Central Facial Paralyses,Central Facial Paralysis,Facial Palsies,Facial Paralyses, Central,Facial Paralyses, Peripheral,Palsies, Facial,Palsy, Facial,Paralyses, Central Facial,Paralyses, Facial,Paralyses, Hemifacial,Paralysis, Central Facial,Paralysis, Facial,Paralysis, Hemifacial,Paralysis, Peripheral Facial,Pareses, Facial,Paresis, Facial,Peripheral Facial Paralysis
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012680 Sensitivity and Specificity Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed) Specificity,Sensitivity,Specificity and Sensitivity
D012984 Software Sequential operating programs and data which instruct the functioning of a digital computer. Computer Programs,Computer Software,Open Source Software,Software Engineering,Software Tools,Computer Applications Software,Computer Programs and Programming,Computer Software Applications,Application, Computer Software,Applications Software, Computer,Applications Softwares, Computer,Applications, Computer Software,Computer Applications Softwares,Computer Program,Computer Software Application,Engineering, Software,Open Source Softwares,Program, Computer,Programs, Computer,Software Application, Computer,Software Applications, Computer,Software Tool,Software, Computer,Software, Computer Applications,Software, Open Source,Softwares, Computer Applications,Softwares, Open Source,Source Software, Open,Source Softwares, Open,Tool, Software,Tools, Software
D014741 Video Recording The storing or preserving of video signals to be played back later via a transmitter or receiver. Audiovisual Recording,Videorecording,Audiovisual Recordings,Recording, Audiovisual,Recording, Video,Recordings, Audiovisual,Recordings, Video,Video Recordings,Videorecordings

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