TY - JOUR
T1 - Quantitative evaluation of facial palsy by contour extraction of facial features
AU - Tanaka, Toshiyuki
AU - Orukawa, Shohei
AU - Yoshida, Noriyuki
AU - Kunihiro, Takanobu
PY - 2001/12/1
Y1 - 2001/12/1
N2 - At present, in the medical field 40 points method and facial nerve grading system are generally used for evaluation of facial palsy. However, these methods have limitation in the precise evaluation, because subjectivity of each doctor in charge influenced the clinic results, and there are some problems in terms of reproducibility in diagnosis. It is also difficult to understand how patients are recovering from these evaluation methods. Some approaches have been tried to solve these problems. But they are not widely applied to real diagnosis. Purpose of this paper is to extract contours of facial features and to propose quantitative evaluation of facial palsy. Facial nerve symptons generally appear in either side of the face. Therefore we used contour of eyes, a lip and wrinkle as features, noting that the symmetry of facial features. Contours of facial features of many subjects were extracted, after subject's faces were taken to digital videotapes. We used four facial expressive motions for diagnosis of some healthy persons and palsy subjects. We defined some indices of evaluation of palsy grade. These indices showed shape of facial features quantitatively. We confirmed from results of observation that the recovery process was quantitatively shown.
AB - At present, in the medical field 40 points method and facial nerve grading system are generally used for evaluation of facial palsy. However, these methods have limitation in the precise evaluation, because subjectivity of each doctor in charge influenced the clinic results, and there are some problems in terms of reproducibility in diagnosis. It is also difficult to understand how patients are recovering from these evaluation methods. Some approaches have been tried to solve these problems. But they are not widely applied to real diagnosis. Purpose of this paper is to extract contours of facial features and to propose quantitative evaluation of facial palsy. Facial nerve symptons generally appear in either side of the face. Therefore we used contour of eyes, a lip and wrinkle as features, noting that the symmetry of facial features. Contours of facial features of many subjects were extracted, after subject's faces were taken to digital videotapes. We used four facial expressive motions for diagnosis of some healthy persons and palsy subjects. We defined some indices of evaluation of palsy grade. These indices showed shape of facial features quantitatively. We confirmed from results of observation that the recovery process was quantitatively shown.
KW - Contour extraction
KW - Facial palsy
KW - Quantitative estimation
KW - Uniform color space
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M3 - Conference article
AN - SCOPUS:0035782312
VL - 4
SP - 3735
EP - 3738
JO - Annual Reports of the Research Reactor Institute, Kyoto University
JF - Annual Reports of the Research Reactor Institute, Kyoto University
SN - 0454-9244
T2 - 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Y2 - 25 October 2001 through 28 October 2001
ER -