Study on imaging system for noncontact pulse oximetry by using RGB camera

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560513
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Measurement engineering
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: NISHIDATE IZUMI 東京農工大学, 工学(系)研究科(研究院), 准教授 (70375319)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 容積脈波 / イメージング / 酸素飽和度 / 脈拍数 / RGBカメラ

Outline of Final Research Achievements

To visualize the plethysmographic signals remotely, we investigated a method that is specifically developed for estimating the concentrations of oxygenated blood, deoxygenated blood, and total blood in skin tissue from RGB digital color images. The plethysmographic signals were extracted from the time course of total blood concentration by FFT band pass filter. Heart rate (HR), pulse wave amplitude (PWA), and arterial oxygen saturation were calculated from the extracted plethysmographic signals. In vivo imaging of rat skin flap during varying fraction of inspired oxygen demonstrated the possibility of the method to evaluate arterial oxygen saturation. In vivo experiments were performed for human subjects during rest and after knee bends exercise. We confirmed that the ability of the method to evaluate the blood volume pulse and oxygen saturation simultaneously.

Free Research Field

計測光学、生体医用光学