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A detailed theoretical assessment is made of a helicon-supporting element of a new type of microwave filter constructed in a Fabry-Perot manner, well-known in optical physics. The optimum properties are discussed and the behaviour of a slab of InSb, biased by an external magnetic field, is analysed. A novel analysis of tunability is introduced, and numerical results are presented which include loss per wavelength and loci of the real part of the helicon wavenumber. Some of the numerical work is discussed analytically, using a one-component plasma as a simplification. It is proved that, for InSb, there is a peak tunability for slightly p-type material, while the minimum power loss occurs for slightly n-type material. A discussion is also presented in terms of the Q-value of the filter performance.

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The current technologies that trend in digital radiology (DR) are toward systems using portable smart mobile as patient-centered care. We aimed to develop a mini-mobile DR system by using smart devices for wireless connection into medical information systems. We developed a minimobile DR system consisting of an X-ray source and a Complementary Metal-Oxide Semiconductor (CMOS) sensor based on a flat panel detector for small-field diagnostics in patients. It is used instead of the systems that are difficult to perform with a fixed traditional device. We also designed a method for embedded systems in the development of portable DR systems. The external interface used the fast and stable IEEE 802.11n wireless protocol, and we adapted the device for connections with Picture Archiving and Communication System (PACS) and smart devices. The smart device could display images on an external monitor other than the monitor in the DR system. The communication modules, main control board, and external interface supporting smart devices were implemented. Further, a smart viewer based on the external interface was developed to display image files on various smart devices. In addition, the advantage of operators is to reduce radiation dose when using remote smart devices. It is integrated with smart devices that can provide X-ray imaging services anywhere. With this technology, it can permit image observation on a smart device from a remote location by connecting to the external interface. We evaluated the response time of the mini-mobile DR system to compare to mobile PACS. The experimental results show that our system outperforms conventional mobile PACS in this regard.

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