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Magnetic Resonance Imaging (MRI) is a widely used technique to obtain images in different applications based on the nuclear magnetic renonance (NMR) phenomenon. Gradient coils are the responsible components for encoding the volume of interest (VOI). Linearity, inductance and resistance are taken in account to perform the gradient coil design. In this work, EM and thermal gradient coil properties are...
A histological intraoperative analysis of tissue specimen is usually required for evaluation of sentinel lymph node (SLN) and determination of margins of surgical resection. Currently, this analysis is performed by Touch Imprint Cytology (TIC), Frozen Section (FS) analysis, scrape cytology or a combination of these methods. We propose an alternative approach based on Magnetic Resonance Imaging (MRI)...
In this work, a direct image reconstruction algorithm for PET is proposed. This method follows naturally from the concept of LOR, and easily admits depth of interaction and time of flight information. In addition, this algorithm does not require the computation of sinograms or a system matrix. Thus, it is not restricted in the formation of high pixel density images and allows the image formation in...
The guidelines for mapping rectangular waveguide structures to substrate integrated waveguide (SIW) technology are well understood for structures with straight walls. However, the mapping of a smooth profile structure from rectangular waveguide to SIW technology is not trivial and it needs to be carefully studied. A general procedure for mapping any smooth profile H-plane rectangular waveguide structure...
Microstrip tapered transitions are commonly used as the best solution when an interface between substrate integrated waveguide (SIW) and a microstrip line is needed. However, in this paper, we show how the microstrip taper works much worse when the SIW has a high characteristic impedance compared to the microstrip one, and how a transition made in SIW has better performance in this case. Field plots,...
A Computer-Aided Design (CAD) tool based on an Aggressive Space Mapping (ASM) design strategy has been implemented for designing H-plane direct-coupled-cavity waveguide filters considering rounded corners. These corners are typically present in the windows or in the cavities of filters with coupled cavities due to defects in the most common manufacturing processes. In the ASM strategy, a very efficient...
An Agressive Space Mapping (ASM) strategy for efficiently and accurately designing passive filters in substrate integrated waveguide (SIW) technology is presented and successfully validated for the double post topology. Full-wave simulators based on open space modal expansions are used in both the coarse and fine models of this strategy.
A strategy for efficiently and accurately designing passive devices in substrate integrated waveguide (SIW) technology is going to be developed and validated with the design of several filters in different topologies.
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