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Remote body arrays for high-performance magnetic resonance imaging and spectroscopy

一种磁共振成像、磁共振扫描的技术，应用在测量磁变量、测量装置、仪器等方向

Active Publication Date: 2012-01-25
SIEMENS HEALTHCARE GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

New designs that further improve SNR are also possible if appropriate current paths are included in the remote body array

Method used

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  • Remote body arrays for high-performance magnetic resonance imaging and spectroscopy
  • Remote body arrays for high-performance magnetic resonance imaging and spectroscopy
  • Remote body arrays for high-performance magnetic resonance imaging and spectroscopy

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Experimental program
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Embodiment Construction

[0017]In order to explore the characteristics of SNR as a function of distance from the body, use in (Schnell W, Renz W, Vester M, Emert H. Ultimate Signal-to-Noise Ratio of Surface and Body Antennas for Magnetic Resonance Imaging. IEEE Transactions on Antennas and Propagation 2000;48(3):418-428), updated as described in (Sodickson DK, et.al. Approaching the Ultimate Intrinsic Signal-to-Noise Ratio in a Cylindrical Geometry: Electrodynamics of Large Encircling Radiofrequency Coil Arrays.2008 ; in preparation), numerical simulations were performed. Figure 1A Shows the simulated geometry in which a 20 cm radius dielectric cylinder (body lining) with uniform permittivity and conductivity (in this case approximating the average frequency-dependent properties in muscle tissue), is surrounded by an equal or larger radius Enclosed by a cylinder that allows current to flow on the cylinder. Figure 1B The same geometry is shown for a 30 cm radius array (hole liner). For the space bet...

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Abstract

In a magnetic resonance imaging apparatus and method, radio frequency signals are radiated into an examination subject and / or received from the examination subject by an array of radio frequency coils that completely encircles the examination subject, and that is located at a distance from the examination subject out of contact with the examination subject.

Description

technical field [0001] The invention relates to the use and construction of radio frequency transmit and / or receive coils in magnetic resonance imaging. Background technique [0002] Body coils integrated into most modern magnetic resonance (MR) scanners are typically a birdcage design operated as a single quadrature element. At low to moderate magnetic field strengths, the design allows more or less uniform excitation and reception. Enhancement in reception can be achieved by using radio frequency (RF) coil arrays (Roemer PB, Edelstein WA, Hayes CE, Souza SP, Mueller OM. The NMR phased array. Magn Reson Med 1990; 16(2):192-225) SNR. [0003] The use of radiofrequency coil arrays in MRI has increased dramatically over the past decade. Benefits of multi-element arrays include SNR improvement (Roemer PB, Edelstein WA, Hayes CE, Souza SP, Mueller OM. The NMR phased array. Magn Reson Med 1990; 16(2):192-225) and parallel imaging capabilities (Sodickson DK , Manning WJ. Simul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/3415
CPCG01R33/34023G01R33/3415
Inventor D.索迪克森S.比伯W.伦兹W.施耐尔M.韦斯特
Owner SIEMENS HEALTHCARE GMBH