RF COIL, AND MAGNETIC RESONANCE IMAGING DEVICE

WIPO Patent Application WO/2012/111433

A1

The purpose of the present invention is to provide a technique for improving image quality by sufficiently eliminating the magnetic coupling between RF coils when using a multi-element multi-tuned RF coil as the reception RF coil for an MRI device. In the present invention, an inter-coil magnetic coupling prevention circuit which provides high impedance and resonates at the frequencies to which each RF coil is tuned is disposed on each RF coil constituting the multi-element multi-tuned RF coil used as the reception RF coil for an MRI device. The inter-coil magnetic coupling prevention circuit adjusts an inductor and a capacitor such that a circuit on the preamplifier-side when viewed from both ends of a signal reception circuit and a circuit on the signal reception circuit-side when viewed from both ends of a series resonant circuit connected to the preamplifier both resonate at the plurality of frequencies to which the RF coils are tuned.

OTAKE YOSUKE (JP)
SOUTOME YOSHIHISA (JP)
SATO RYOTA (JP)
BITO YOSHITAKA (JP)
HIRATA KOJI (JP)

PCT/JP2012/052270

August 23, 2012

February 01, 2012

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HITACHI LTD (JP)
OTAKE YOSUKE (JP)
SOUTOME YOSHIHISA (JP)
SATO RYOTA (JP)
BITO YOSHITAKA (JP)
HIRATA KOJI (JP)

A61B5/055

JP2007097971A	2007-04-19
JP2008295737A	2008-12-11

N. I. AVDIEVICH ET AL.: "4T Actively-Detunable Double-Tuned 1H/31P TEM Head Volume Coil and Four-Channel 31P Phased Array for Human Brain Spectroscopy", PROC. INTL. SOC. MAG. RESON. MED., vol. 14, no. 2595, May 2006 (2006-05-01)

Sannozaka Patent Law Firm (JP)
Patent business corporation The Sanno hill patent firm (JP)

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