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Auto-Detection of Non-Isolated Pulmonary Nodules Connected to The Chest Walls in X-ray CT images
Satoshi Shimoyama,Noriyasu Homma,Masao Sakai,Tadashi Ishibashi,Makoto Yoshizawa 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, we develop an auto-detection method of non-isolated pulmonary nodules for computer-aided diagnosis (CAD) of lung cancers using X-ray CT images. An essential core of the method is to transform the non-isolated nodules connected to the walls of the chest into isolated ones that can be detected more easily by CAD systems developed previously. To this end, an active contour model is proposed to extract the lung area from the original CT image. The proposed model can solve the local optimum problem of the contour model by using anatomical features of the lung in X-ray CT slices. Some experimental results demonstrate the usefulness of the proposed method by using clinical CT images.
Parameter Determining Method of Robust Digital Controller for PWM Power Amplier
Tokubai Ki,Kohji HIGUCHI,Kazushi NAKANO,Tatsuyoshi KAJIKAWA,Satoshi YOSHIZAWA,Koji MATSUSHITA,Fumiho CHINO 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper a parameter determing method of digital controller is proposed for spreading capacitance load range more and improving transient charateristics for inductance load. In the previous proposed controller, the conguration of the controller is the same to all loads. At inductive load, there is a possibility that the transient characteristics may become bad and the specication may not be satised. Therefore, a load currentis estimated at inductive load, and the controller which also uses load cur-rent for feedback is congured. ADSP is implemented to this digital controller. It is demonstrated from experiments that the digital controller of which parameters are deter-mined by the proposed method satises the given speci-cations.