Suresh Nilesh, Sivakumar Arvind
Department of Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India.
Bioinformation. 2021 Sep 30;17(9):814-817. doi: 10.6026/97320630017814. eCollection 2021.
It is of interest to evaluate the distortion of intraoral frontal photographs using various focal lengths. Intra-oral frontal view pictures of 20 subjects were taken using a standard 18-55mm lens of a DSLR camera at three different focal lengths (18mm, 35mm, 55mm). 52 experienced orthodontists were chosen and they were asked to assess the photographs and choose the one with the least amount of distortion. Majority of the orthodontists selected the frontal photograph taken at a focal length of 35mm as the best photo with the least distortion among the three photographs. The photos taken at a focal length of 35 mm showed the least amount of distortion.
评估使用不同焦距时口腔内正面照片的失真情况很有意义。使用数码单反相机的标准18 - 55毫米镜头，在三个不同焦距（18毫米、35毫米、55毫米）下拍摄了20名受试者的口腔内正面视图照片。挑选了52名经验丰富的正畸医生，要求他们评估这些照片并选出失真最少的一张。大多数正畸医生选择焦距为35毫米时拍摄的正面照片作为三张照片中失真最少的最佳照片。在35毫米焦距下拍摄的照片失真最少。
