Fast and unconditionally safe in vivo MR head protocol for home-made coil prototype assessment at 7T
نویسندگان
چکیده
منابع مشابه
Common mode volume coil design for in vivo MR imaging at 7T
Introduction The volume coil is a well-established coil which creates homogeneous B1 field and MR images (1). In order to yield homogenous B1 field distribution, sufficient coupling among the resonant elements (rungs) of a volume coil is necessary. Although the coupling could be improved by reducing the distances between the coil elements, increasing the dimension and number of the coil element...
متن کاملNumerical Comparison Between TEM Head Coil and Birdcage Head Coil at 7T
G. D. DeMeester, Z. Zhai, M. A. Morich, C. Leussler, C. Findeklee Philips Medical Systems, Cleveland, Ohio, United States, Philips Research Laboratories, Hamburg, Hamburg, Germany Introduction A TEM T/R head coil and a shielded birdcage T/R head coil operated at 298MHz/7T were both modeled using the Finite Difference Time Domain (FDTD) method. The two coils have approximately the same physical ...
متن کاملAutomatically tuned and matched RF transceive head coil at 7T
Introduction The transmit efficiency and receive signal-to-noise ratio (SNR) of transceive RF coils depends on how well the resonance circuit is tuned to the Larmor frequency and matched to the 50 ohm coaxial cable. Patient size variability changes the load the coil couples with and adversely impacts both tuning and matching, and subsequently the power efficiency and SNR of the coil. The loadin...
متن کاملDesign Optimization of a 32-Channel Head Coil at 7T
B. Keil, C. Triantafyllou, M. Hamm, and L. L. Wald A.A. Martinos Center for Biomedical Imaging, Department of Radiology, MGH, Harvard Medical School, Charlestown, MA, United States, A.A. Martinos Imaging Center, Mc Govern Institute for Brain Research, MIT, Cambridge, MA, United States, Siemens Healthcare, Charlestown, MA, United States, Harvard-MIT Division of Health Sciences and Technology, MI...
متن کاملTowards the Optimum 7T Head RF Coil
G. McKinnon, E. Boskamp GE Medical Systems, Waukesha, WI, United States Introduction Numerical simulations were used in an attempt to find the optimal configuration for a 7T head coil. The high-pass birdcage, the hybrid birdcage, and the TEM resonator were compared. The coil dimensions were kept as similar as possible. Performance was evaluated on the basis of normalized peak E field, SNR and B...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2018
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/1092/1/012159