Three-Dimensional Endoscopic Ultrasonography for Colorectal Region Tadayoshi Kakemura 1 , Yukako Nemoto 1 , Sumio Fujinuma 1 , Koichiro Sato 1 , Akihiko Ota 1 , Tsutomu Iida 1 , Sayo Ito 1 , Koichi Hirahata 1 , Fumiko Shigiyama 1 , Tsukasa Furuhata 1 , Yuki Yokouchi 2 , Iruru Maetani 1 1Division of Gastroenterology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo 2Department of Pathology, Toho University Ohashi Medical Center, Tokyo Keyword: 大腸 , 三次元 , 内視鏡的超音波断層法 pp.929-938
Published Date 2008/5/25
DOI https://doi.org/10.11477/mf.1403101384
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 In endoscopic ultrasonography (EUS) for colorectal region, three-dimensional (3D) EUS using slim ultrasonic probes is being increasingly employed. To observe a much wider area in the anorectal region, a new rectal 3D rigid probe with a 7.5 MHz transducer has been developed.

 In the 3D reconstructions by helical scanning, real-time 3D image reconstructions in all observation modes including the surface-rendering image (SRI) inside a digestive tract are available at examination. 3D processing of SRI and cross-sectional images were valuable for visually exploring the deepest point of cancer invasion and for the diagnosis of lymph node metastases. Arbitrary cross-sectional images of the lesions can be demonstrated in any chosen plane. By examining the image of the junction of the head and the stalk in the pedunculated lesions, the level of submucosal cancer invasion can be evaluated.

 It can be expected that the need to utilize technology used in other fields to acquire data of the variable scanning plane will lead to the development of all EUS equipment that can perform 3D imaging.

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