2025 年 92 巻 1 号 p. 37-49
Introduction : Facial soft tissue morphological records are essential for the treatment planning and postoperative evaluation of facial deformities. In this study, we evaluated whether three-dimensional (3D) models of facial features reconstructed using photogrammetry software and smartphone-based image acquisition can be used in clinical practice.
Materials and Methods : Photogrammetric 3D models of an inanimate object (a mannequin head) and human volunteers were reconstructed from smartphone recordings, and their trueness was evaluated using point-to-point measurements using a caliper and their precision by superimposing the 3D models. A trueness evaluation was performed by superimposing the CT data and 3D models for the mannequin head and patients.
Results : The trueness of the point-to-point measurements was approximately 0.3% when measuring inanimate objects and approximately 0.5% when measuring humans (volunteers). The trueness of the surface deviations was approximately 0.6mm when measuring inanimate objects and approximately 1mm when measuring humans (patients). The precision of the surface deviations between the photogrammetric 3D models was approximately 0.2mm when measuring inanimate objects and approximately 0.3mm when measuring humans (volunteers).
Conclusion : The trueness and precision of the facial 3D models reconstructed using photogrammetry software and smartphone-based image acquisition were acceptable. Although technical stability and patient patience and cooperation are required, this method is considered sufficiently clinically applicable.
