Attempt for transillumination imaging along irregular-shape surface

• Published in: Transactions of Japanese Society for Medical and Biological Engineering Vol. Annual58; no. Abstract; p. 439
• Main Authors: WANG, XIAO, Van, To Ni Phan, Shimizu, Koichi
• Format: Journal Article
• Language: Japanese
• Published: Japanese Society for Medical and Biological Engineering 2020; 公益社団法人 日本生体医工学会
• ISSN: 1347-443X; 1881-4379
• DOI: 10.11239/jsmbe.Annual58.439

Using the near-infrared (NIR) light within the wavelength range of the biological window, we can visualize the subcutaneous blood vessel and the hemoglobin distribution. If we can arrange the directions of light source and image sensor appropriately, we can expect to map the blood vessel or the hemoglobin distribution all over our body. To realize this goal, we introduced a human-cooperating robot-arm system to our NIR transillumination system. First, we attach a stereoscopic camera on the robot-arm and measure the 3 dimensional coordinates of the irregular surface shape of a subject. Then we replace the stereoscopic camera by the NIR light source and CMOS camera for transillumination imaging. The robot arm places the light source and the camera at the appropriate position and orientation, and captures transillumination images. It repeats the same operation while changing the position to scan all the surface of the subject. The images are stored to reconstruct the 3 dimensional transillumination image of the subject body. In a preliminary study, the operation of the first part was confirmed with a human adult arm.