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The object of this study is to assess the relevance of MRI water/fat separation to quantify fat and water in fish in a view of high throughput measurements. The major issue for this purpose is the spatial inhomogeneities of the signal. They are inherent to MRI and they may induce a position dependent bias in the quantification. We have combined water/fat separation methods from the literature and...
High field MRI makes it possible to obtain images of non-proton (X) nuclei due to its increased sensitivity. A double-resonant coil can provide both images of X nucleus and proton without the need to reposition the patient. Most double-resonant coils use lossy trap circuits to minimum interactions between X nucleus and H nucleus. In this study, we propose a hybrid sodium/proton double-tuned transceiver...
A 0.1 kg palm NMR system using a fully integrated CMOS RF transceiver is reported. It is 20?? lighter, 30?? smaller, yet 2.5?? more spin-mass sensitive than our prior system, and 1200?? lighter, 1200?? smaller, yet 150?? more spin-mass sensitive than a commercial system. A one-chip NMR system for on-chip disease screening is also reported, which detects hCG cancer markers and bladder cancer cells.
We present in this paper a dedicated home-built RF probe-head for the MRI of rat brain at 2.35 T. This probe consists of an association of three coils: a double-tuned birdcage coil, which could be used for both transmitting and receiving, and a single-tuned surface coil that is used for the only receiving. This single-tuned coil is actively decoupled from the double-tuned volume coil. The active decoupling...
Transmit B1+ field homogenization in high-field ( > 3.0 T) human magnetic resonance imaging (MRI) is challenging due to radio-frequency wavelength effects. An approach based on appropriately coupling surface coils to a volume coil was investigated. Electromagnetic simulation results demonstrated the feasibility and effectiveness of this method in proton MRI of the human head at 7.0 T.
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