The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Radiofrequency (RF) ablation uses RF current to heat and kill cancer applied via an electrode inserted under image-guidance, and is in clinical use for tumors in liver, lung kidney, and bone. Mathematical models are frequently used to determine tissue temperature during RF ablation, but most prior models do not include accurate implementation of power control algorithms as are used in clinical devices...
This article presents a compact, mobile-unit, internal-UWB antenna that is suitable for concealment in a confined space, for future UWB applications. The antenna is 6 mm times 33 mm in dimension and can easily be fed by mini-cable line. The antenna is designed to operate in the lower band (band group 1 = 3.1 - 4.85 GHz) of the UWB frequency band. Finally, details of the prototype are described, and...
Optical imaging using independent component analysis (OPTICA) has been used for detection, 3D localization, and cross-section imaging of a tumor inside a model human breast composed of ex vivo human breast tissues. OPTICA uses a multisource target illumination and multidetector signal acquisition scheme to obtain multiple spatial and angular views of the sample for target localization. Independent...
The design of an ultra wide band (UWB) semi-directional antenna is presented. Both antenna optimizations by simulation and measurement results are presented. The final prototype size is 33 mm times 20 mm times 11.5 mm. The achieved input bandwidth is 3.9-15 GHz. The maximum boreside realized gain (BRG) is 7.5 dBi and the maximum Front-to-Back-ratio (FTBR) is 13 dB. The frequency variance of the antenna...
A planar UWB monopole antenna with dual feed is designed for low-cost applications. The achieved input impedance bandwidth is 4-11 GHz for a size of 33 mm times 20 mm times 1.5 mm. The design is based on a square-like microstrip thick monopole drilled with its feeding circuit on a substrate of epsivtau= 2.33. The behaviour of the antenna operating in free-space is investigated both in the frequency...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.