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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...
Magnetic Resonance Imaging (MRI) induced heating on patients with pacemaker (PM) or implantable cardioverter-defibrillator (ICD) can pose severe health risks. Experimental studies in this field have shown a great variability in results and revealed that several aspects can affect the amount of heating induced at the lead tip. The structural parameters of the lead are one of these. In this study we...
A novel approach to image-guided radiotherapy being undertaken by a few groups involves the integration of a linac with a magnetic resonance imager (MRI). In order to successfully combine a linac with a MRI, it is important to understand the characteristics and major sources of radio frequency (RF) noise from the pulse power modulator of a linac since these may interfere with the operation of the...
An off-resonance saturation (ORS) method was used for magnetic resonance imaging of superparamagnetic polymeric micelles (SPPM). SPPM was produced by encapsulating a cluster of magnetite nanoparticles (9.9plusmn0.4 nm in diameter) in poly(ethylene glycol)-b-poly(D, L-lactide) (PEG-PLA) copolymer micelles (micelle diameter: 60plusmn9 nm). In ORS MRI, a selective radiofrequency (RF) pulse was applied...
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