Chan Kenneth H, Tom Henry, Darling Cynthia L, Fried Daniel
University of California, San Francisco, San Francisco, CA 94143-0758.
Proc SPIE Int Soc Opt Eng. 2015 Feb 24;9306. doi: 10.1117/12.2083651.
Previous studies have established that caries lesions can be imaged with high contrast without the interference of stains at near-IR wavelengths greater than 1300-nm. It has been demonstrated that computer controlled laser scanning systems utilizing IR lasers operating at high pulse repetition rates can be used for serial imaging and selective removal of caries lesions. In this study, we report our progress towards the development of algorithms for generating rasterized ablation maps from near-IR reflectance images for the removal of natural lesions from tooth occlusal surfaces. An InGaAs camera and a filtered tungsten-halogen lamp producing near-IR light in the range of 1500-1700-nm were used to collect crosspolarization reflectance images of tooth occlusal surfaces. A CO laser operating at a wavelength of 9.3- μm with a pulse duration of 10-15-μs was used for image-guided ablation.
先前的研究已经证实，在大于1300纳米的近红外波长下，龋损能够在无污渍干扰的情况下以高对比度成像。已经证明，利用以高脉冲重复率运行的红外激光的计算机控制激光扫描系统可用于龋损的序列成像和选择性去除。在本研究中，我们报告了在开发从近红外反射图像生成光栅化消融图以去除牙齿咬合面天然龋损的算法方面所取得的进展。使用一台铟镓砷相机和一盏产生1500 - 1700纳米范围内近红外光的滤光钨卤灯来采集牙齿咬合面的交叉偏振反射图像。一台波长为9.3微米、脉冲持续时间为10 - 15微秒的CO激光用于图像引导消融。
