ASSESSMENT OF THE ASYMMETRY OF THE FACE BY THE PHOTOGRAMMETRIC METHOD AND ITS FEATURES

Abstract. Three-dimensional analysis of human face change is actively implemented in various medicine area. Introduction of numerical methods of change analysis and three-dimensional visualization technologies provides analysis with simultaneous examined patient comfort enhancement due to reduction involvement time in the process of changes.

Below is described the Russian photogrammetric system development experience, that is designed for quantitative assessment of human facial shape changes, which can be used both for monitoring the patient treatment progress, and for the purposes of evidence-based medicine. The article considers step by step the process of obtaining a full-size patient's face "from ear to ear" model as a result of one-step imaging using the developed system. The offered method of asymmetry estimation by three-dimensional digital face model is a highly precise way for asymmetry objectivization, allows to reveal face's bilateral and dynamic asymmetry and to establish functional features of mimic muscles, define soft tissue volumes etc. This method can be successfully applied for diagnostics (including - expert), at therapy planning, as well as in evidence-based medicine at estimation of hardware, thread and injection manipulations in aesthetic medicine.

As a result of accuracy parameters evaluation, it was determined that the result of developed system application within the proposed method framework meets the requirements of medical standards and can be successfully applied as a means of monitoring in the process of treatment.