BACKGROUND The purpose of this study was to establish the feasibility of three-dimensional (3D) balanced steady-state-free-precession (bSSFP) myocardial perfusion cardiovascular magnetic resonance (CMR) at 3T using local RF shimming with dual-source RF transmission, and to compare it with spoiled gradient echo (TGRE) acquisition. METHODS Dynamic contrast-enhanced 3D bSSFP perfusion imaging wa...

The conversion of electrical signals into modulated optical waves and back into electrical signals provides the capacity for low-loss radio-frequency (RF) signal transfer over optical fiber. Here, we show that the unique properties of this microwave-photonic link also enable the manipulation of RF signals beyond what is possible in conventional systems. We achieve these capabilities by realizin...

Scientific Test and diagnosis for mixed-signal/RF integrated devices, design-for-test, behavioral and statistical modeling Fields of expertise Microelectronics, control, statistics Know-how Test metrics estimation, machine-learning-based test, parameter estimation for test and control, diagnosis, mixed-signal/RF design-for-test Industrial transfer Techniques of integrated test for analog-to-dig...

The center idea behind the software radio architecture is to place analog-to-digital and digital-to-analog converters as near the antenna as possible, leaving the implementation of the most radio functionality to a programmable micro or signal processor. One way to accomplish this in a radio receiver front end is by direct downconverting the desired radio frequency (RF) signal to a target inter...

Scientific Test and diagnosis for mixed-signal/RF integrated devices, design-for-test, behavioral and statistical modeling, embedded control Fields of expertise Microelectronics, control, statistical modelling Know-how Test metrics estimation, machine-learning-based test, non-intrusive test and control, diagnosis, mixed-signal/RF design-for-test Industrial transfer Techniques of integrated test...

Scientific Test and diagnosis for mixed-signal/RF integrated devices, design-for-test, behavioral and statistical modeling, embedded control Fields of expertise Microelectronics, control, statistical modelling Know-how Test metrics estimation, machine-learning-based test, non-intrusive test and control, diagnosis, mixed-signal/RF design-for-test Industrial transfer Techniques of integrated test...

A spatially resolved extended phase graph (SR-EPG) framework is proposed for prediction of echo amplitudes in the presence of spatially variable radio frequency (RF) fields. The method may be used to examine any regularly repeating pulse sequence and provides a design framework for parallel transmission (PTx) systems; in this work signal homogeneity in static pseudo-steady state (SPSS) turbo sp...

To break through the energy-latency tradeoff caused by duty cycling in the existing wireless sensor network (WSN), in this paper we propose a new RF wakeup sensor, which is a dedicated small RF module to check potential communications by sensing the presence of a RF signal. With RF wakeup sensor each node no longer requires duty cycling, eliminating both sleep delay and idle listening. The dist...

Presents information on the MMTS RF/Mixed Mixed-Signal Integrated Circuits and Signal Processing Committee.

Higher field strengths entail less homogeneous RF fields. This may influence quantitative MRI and MRS. A method for rapidly mapping the RF field in the human head with minimal distortion was developed on the basis of a single-shot stimulated echo acquisition mode (STEAM) sequence. The flip angle of the second RF pulse in the STEAM preparation was set to 60 degrees and 100 degrees instead of 90 ...