Diagram showing transmit-receive head coil in an MR system. RF-transmission requires a separate field (B1) rotating/oscillating near the proton resonant (Larmor) frequency directed perpendicularly to the main magnetic field (Bo). To stimulate the NMR spin system, an RF-coil must produce a time...
A magnetic resonance coil comprising: a first set of coil elements (54,56,80), which can be operatively connected to the transmit channel (66,74), the following is greater than 3 Tesla magnetic field strength for a selected coupled load transmitting sensitive area; and a second set of coil...
Double resonant transmit receive solenoid coil for mri.A magnetic resonance system () comprises a radio frequency coil () which can resonate at least at first and second predetermined resonance frequencies. A tuning resonant circuit () i... P Mazurkewitz,C Leussler,J Keupp,... 被引量: 8...
A detuning/decoupling arrangement for a Magnetic Resonance Imaging (MRI) system RF coil arrangement (of the typing using the nuclear magnetic resonance, or NMR, phenomenon) uses switching diodes to selectively connect and disconnect portions of an RF resonant circuit in response to a DC control ...
Frequency tuning and coupling capacitances in MRI RF receive coils are typically realized, at least in part, as reverse biased varactor diodes. During RF tuning of the transmit coil (i.e., so as to achieve resonance and matched impedance conditions), at least some if not all of the varacto...
An MRI transmit array is also disclosed, which includes a plurality of RF transmitters for generating a plurality of RF signals, the RF coil array above-mentioned, and a DC voltage source for providing a DC voltage to the plurality of transmit coil elements. The RF coil array further ...
A novel mono-surface antisymmetric 16-element transmit/receive (Tx/Rx) coil array was designed, simulated, constructed, and tested for cardiac magnetic resonance imaging (cMRI) in pigs at 7 T. The cardiac array comprised of a mono-surface 16-loops wit
Fast Mapping of Relative B1+ Phase in the Human Head at 9.4 Tesla with a 14 Channel Transceive Coil Array We report experimental evidence that in the human brain, at 9.4T, mapping the relative phase of Transmit B1 (B1+), for each coil element of a head array co... PFVD Moortele,C...
In the context of pTX pulse design in MRI, machine learning models have been employed in prior publications. One recent study [24] describes patient-specific pulse prediction with an iterative kernel ridge regression algorithm to achieve SAR-efficient RF-shimming in the head. An example of discrim...
A 15-channel transmit-receive (transceive) radiofrequency (RF) coil was developed to image the human brain at 7 T. A hybrid decoupling scheme was implement... KM Gilbert,AT Curtis,JS Gati,... - 《Nmr in Biomedicine》 被引量: 81发表: 2011年 Slice-by-slice B1+ shimming at 7 T B1+...