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.
Purpose
To demonstrate that strategic use of materials with high electric permittivity along with integrated head‐sized coil arrays can improve SNR in the entire brain.
Methods
Numerical simulations were used to design a high‐permittivity material (HPM) helmet for enhancing SNR throughout the brain in receive arrays of 8 and 28 channels. Then, two 30‐channel head coils of identical geometry were...
In the reconstruction of dielectric objects by integral equation approach (IEA), the forward scattering integral equation (FSIE) and the inverse scattering integral equation (ISIE) are alternatively solved in the frame of distorted Born iterative method (DBIM) or its variations. In this work, we consider the reconstruction under a limited observation which is more practical. We use a DBIM-like Gauss-Newton...
Solving volume integral equations (VIEs) with anisotropic media usually relies on the method of moments (MoM) with the divergence-conforming Schaubert-Wilton-Glisson (SWG) basis function or curl-conforming edge basis function. However, the basis functions may not be suitable to represent unknown functions when the anisotropy of media is strong. In this work, we replace the MoM with a point-matching...
Cross-hole radar tomography is a useful tool for mapping shallow subsurface dielectric permittivity (ε) and electrical conductivity (σ) parameters. Conventional ray-based tomography suffers from some shortcomings: it provides relatively low resolution images and it cannot supply reliable information on certain types of low velocity structure. Higher resolution images can be provided by full-waveform...
Previous works have shown that placement of a high‐dielectric pad can improve image intensity in a region adjacent to the pad, or that placement of dielectric pads around a large surface of the head can improve image homogeneity on an entire plane through the head in high‐field MRI. Here, experimental results show that use of high‐dielectric pads around the human head can reduce the required input...
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.