Coaxial waveguide MRI

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Targeted travelling wave MRI using a coaxial waveguide

Introduction In high field MRI the RF wavelength in tissue is significantly lower than the dimensions of the imaged object. Under these conditions classical volume resonators create unwanted standing wave patterns. Brunner et al. [1] proposed to use travelling waves using the magnet bore as a circular waveguide, to create a more homogenous RF excitation over a large field of view. However, the ...

متن کامل

An All-Dielectric Coaxial Waveguide.

An all-dielectric coaxial waveguide that can overcome problems of polarization rotation and pulse broadening in the transmission of optical light is presented here. It consists of a coaxial waveguiding region with a low index of refraction, bounded by two cylindrical, dielectric, multilayer, omnidirectional reflecting mirrors. The waveguide can be designed to support a single mode whose propert...

متن کامل

Plasmonic coaxial waveguide-cavity devices.

We theoretically investigate three-dimensional plasmonic waveguide-cavity structures, built by side-coupling stub resonators that consist of plasmonic coaxial waveguides of finite length, to a plasmonic coaxial waveguide. The resonators are terminated either in a short or an open circuit. We show that the properties of these waveguide-cavity systems can be accurately described using a single-mo...

متن کامل

Coaxial waveguide mode reconstruction and analysis with THz digital holography.

Terahertz (THz) digital holography is employed to investigate the properties of waveguides. By using a THz digital holographic imaging system, the propagation modes of a metallic coaxial waveguide are measured and the mode patterns are restored with the inverse Fresnel diffraction algorithm. The experimental results show that the THz propagation mode inside the waveguide is a combination of fou...

متن کامل

Multioctave Spatial Power Combining in Oversized Coaxial Waveguide

We describe a multioctave power-combiner structure using finline arrays in an oversized coaxial waveguide. The spectral-domain method (SDM) is used to compute the propagation constant in this structure, and is verified with HFSS simulations. The SDM method is then employed to synthesize broad-band tapered impedance transformers in finline for coupling energy to and from a set of monolithic micr...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Magnetic Resonance in Medicine

سال: 2011

ISSN: 0740-3194

DOI: 10.1002/mrm.23069