EMATによる大規模3次元画像再構成


英字タイトル:
The study of 3D image reconstruction using EMAT
著者:
西村 良弘 Yoshihiro NISHIMURA 笹本 明 Akira SASAMOTO 鈴木 隆之 Takayuki SUZUKI
発刊日:
公開日:
カテゴリ: 第5回
キーワードタグ:

概要

Instead of using the array probe, the study of 3D image reconstruction using the single probe was done. EMAT single probe has large diameter and large aperture and so the ultrasonic wave propagates not only toward direction z but also x-y directions. An d so the time series of data received by EMAT probe include the information of the flaws not only in z direction but also in x-y direction and it means the image has higher resolution than that can be expected from the sampling space in x-y direction ca n be derived. It can decrease the number of scan lines and sampling points, but it required a large amount of calculation power.. The distribution function of the reflective coefficient can be calculated by integrating probe output and inverse-pupil fu nction with time, and so its calculation can be parallelized by breaking integral range into some ranges. It was shown that parallel computing speed up 3D image reconstruction of the data derived by EMAT.


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