Novel 3-D video for quantification of facial movement
Presented at the Annual Meeting of the American Academy of Otolaryngology–Head and Neck Surgery, Washington, DC, September 16-19, 2007.
Received 6 September 2007; received in revised form 12 November 2007; accepted 12 December 2007.
Objectives
To evaluate a novel 3-D geometry video acquisition system (3-D VAS) for quantifying facial movement.
Methods
Ten normal subjects and four patients with facial paralysis underwent recording of facial movement during three facial expressions. Facial feature points of interest were digitally marked on selected images. The maximum 3-D displacement of the brow and oral commissure and palpebral fissure width were determined.
Results
Test-retest reliability using the 3-D VAS in normal subjects was high (Spearman correlation coefficients 0.661-0.830, P < 0.05). The predicted ratio of left to right facial measurements was 1.00 in normal subjects, and measured mean ratios were 1.05 (brow excursion), 1.01 (palpebral fissure width), and 1.03 (oral commissure excursion), respectively, matching the prediction. The 3-D VAS reliably quantified facial movement on both sides in patients with facial paralysis.
Conclusions
The novel 3-D VAS can accurately and reliably quantify facial movement in healthy subjects. It is promising as a clinical tool to quantify facial movement in patients with facial paralysis.
aDivision of Otolaryngology, University of California San Diego, San Diego, CA
bDepartment of Mathematics, Harvard University, Cambridge, Cambridge, MA
cDepartment of Otolaryngology, Massachusetts Eye and Ear Infirmary/Harvard Medical School, Boston, Boston, MA.
Corresponding author: Ritvik P. Mehta, MD, Division of Otolaryngology–Head and Neck Surgery, University of California San Diego Medical Center, 200 West Arbor Drive #8895, San Diego, CA 92103-8895.
ABSTRACT