知能と情報
Online ISSN : 1881-7203
Print ISSN : 1347-7986
ISSN-L : 1347-7986
原著論文
Fuzzy Ultrasonic Imaging System for Visualizing Brain Surface and Skull Considering Refraction
Masahiro KIMURASyoji KOBASHIKatsuya KONDOYutaka HATAYuri T. KITAMURAToshio YANAGIDA
著者情報
ジャーナル フリー

2008 年 20 巻 1 号 p. 79-89

詳細
抄録

Diagnostic imaging system is a necessity for brain diagnosis. Transcranial Ultrasonography can noninvasively image the intracranial blood flow and brain tissue in real time from only temple area of human head. However, the ultrasonic wave causes attenuation, decentration, and refraction in the skull, so the ultrasonography can not provide the transcranial brain surface image from arbitrary place. In this paper, we propose an imaging system of brain surface and skull from arbitrary places by considering the ultrasonic refraction of the skull. We do an experiment by using a cow scapula to imitate the skull bone and a biological phantom to imitate the cerebral sulcus. We first visualize the shape of scapula, and grasp the shape of scapula surface. We second remove the delay and the multi echoes of refracted wave. We third calculate the thickness of the scapula by using fuzzy inference. In the inference, we employ amplitude, correlation coefficient and the elapsed time. Finally, we calculate the refractive angle of ultrasonic wave and visualize the image referring to the refraction of ultrasonic wave. In the result of applying our method, we can estimate the thickness of scapula at all points, and successfully visualize the phantom surface image.

著者関連情報
© 2008 Japan Society for Fuzzy Theory and Intelligent Informatics
前の記事 次の記事
feedback
Top