Departmental Bulletin Paper Development of laparoscopic camera system to detect gastroepiploic artery by using near-infrared light stereo method
キンセキガイコウ ステレオホウ ニヨル イ ダイモウ ドウミャク イチ タンサクヨウ フックウキョウ カメラ システム ノ カイハツ
キンセキガイコウ ステレオホウ ニ ヨル イダイモウ ドウミャク イチ タンサクヨウ フククウキョウ カメラ システム ノ カイハツ

Nakamachi, Eiji  ,  Nakagawa, Masaki  ,  Narita, Kazuyuki  ,  Morita, Yusuke  ,  Hagiwara, Akeo  ,  ナカマチ, エイジ  ,  ナカガワ, マサキ  ,  ナリタ, カズユキ  ,  モリタ, ユウスケ  ,  ハギワラ, アケオ  ,  仲町, 英治  ,  中川, 昌紀  ,  成田, 和行  ,  森田, 有亮  ,  萩原, 明朗

56 ( 4 )  , pp.232 - 244 , 2016-01-31 , 同志社大学ハリス理化学研究所 , Transcription:ドウシシャ ダイガク ハリス リカガク ケンキュウジョ , Alternative:Harris Science Research Institute of Doshisha University
In this study, we developed a miniature and accurate 3D blood vessel searching (BVS) system for use during minimally invasive laparoscopic surgery. In conventional optical systems used in such surgery, artery imaging and detection are difficult because peripheral bio-tissues of the artery disturb, disperse, and refract light wave propagation, resulting in unclear images. To overcome this problem, we use near-infrared (NIR) light, two CMOS camera modules, and a sophisticated image processing technique along with a stereo method to detect the 3D artery position. NIR light shows high permeability for bio-tissues and high absorbance for hemoglobin, thus allowing blood vessels to be imaged and observed by their black color. Unsharp-mask processing was employed to sharpen and improve the image quality. We validated our system through ex-vivo experiment. The artery position was detected using the luminance distribution of the images, and its error was predicted by light propagation analysis. The detected artery position obtained by our proposed system showed good agreement with the true position of a pig’s gastroepiploic artery specimen, thereby confirming the utility and accuracy of our system.

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