WO2011135312A3 - Mri rf coil with improved pin diode switch and reduced b1 distortions - Google Patents

Mri rf coil with improved pin diode switch and reduced b1 distortions Download PDF

Info

Publication number
WO2011135312A3
WO2011135312A3 PCT/GB2011/000667 GB2011000667W WO2011135312A3 WO 2011135312 A3 WO2011135312 A3 WO 2011135312A3 GB 2011000667 W GB2011000667 W GB 2011000667W WO 2011135312 A3 WO2011135312 A3 WO 2011135312A3
Authority
WO
WIPO (PCT)
Prior art keywords
coil
pin diode
mri
distortions
reduced
Prior art date
Application number
PCT/GB2011/000667
Other languages
French (fr)
Other versions
WO2011135312A2 (en
Inventor
Nandita Maria Desouza
David John Gilderdale
Maria Angelica Schmidt
Original Assignee
The Institute Of Cancer Research Royal Cancer Hospital
Royal Marsden Nhs Foundation Trust
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Institute Of Cancer Research Royal Cancer Hospital, Royal Marsden Nhs Foundation Trust filed Critical The Institute Of Cancer Research Royal Cancer Hospital
Publication of WO2011135312A2 publication Critical patent/WO2011135312A2/en
Publication of WO2011135312A3 publication Critical patent/WO2011135312A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
    • G01R33/34053—Solenoid coils; Toroidal coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3642—Mutual coupling or decoupling of multiple coils, e.g. decoupling of a receive coil from a transmission coil, or intentional coupling of RF coils, e.g. for RF magnetic field amplification
    • G01R33/3657—Decoupling of multiple RF coils wherein the multiple RF coils do not have the same function in MR, e.g. decoupling of a transmission coil from a receive coil
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/34084—Constructional details, e.g. resonators, specially adapted to MR implantable coils or coils being geometrically adaptable to the sample, e.g. flexible coils or coils comprising mutually movable parts

Abstract

An MRI detector for detecting RF signals has a solenoid coil which completes one or more solenoid turns. The detector further has one or more tuning capacitors positioned in the coil for tuning the resonance frequency of the coil. The detector further has a PIN diode positioned in the coil and arranged in series with the tuning capacitors. The detector further has circuitry for controlling the bias of the PIN diode. When the PIN diode is forward biased the coil is able to detect RF signals emitted by spins from a subject in response to an excitation Bi magnetic field. When the PIN diode is zero or reverse biased the coil is substantially prevented from distorting the excitation magnetic field.
PCT/GB2011/000667 2010-04-29 2011-04-28 Mri rf coil with improved pin diode switch and reduced b1 distortions WO2011135312A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1007198.3 2010-04-29
GBGB1007198.3A GB201007198D0 (en) 2010-04-29 2010-04-29 MRI detector

Publications (2)

Publication Number Publication Date
WO2011135312A2 WO2011135312A2 (en) 2011-11-03
WO2011135312A3 true WO2011135312A3 (en) 2012-01-05

Family

ID=42289848

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2011/000667 WO2011135312A2 (en) 2010-04-29 2011-04-28 Mri rf coil with improved pin diode switch and reduced b1 distortions

Country Status (2)

Country Link
GB (1) GB201007198D0 (en)
WO (1) WO2011135312A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4306981A1 (en) * 2022-07-14 2024-01-17 Koninklijke Philips N.V. Radio frequency receiver coil with electronic fuse

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325351A2 (en) * 1988-01-19 1989-07-26 The Regents Of The University Of California Switchable MRI RF coil array with individual coils having different and overlapping fields of view
DE4030877A1 (en) * 1990-09-29 1992-04-02 Siemens Ag DOUBLE SURFACE COIL FOR A NUCLEAR MIRROR
JPH05249215A (en) * 1992-03-06 1993-09-28 Mitsuhiro Ono Loop gap resonator
US5280249A (en) * 1991-11-25 1994-01-18 Siemens Aktiengesellschaft Circularly polarizing local antenna for a nuclear magnetic resonance apparatus
US5606259A (en) * 1994-04-15 1997-02-25 Siemens Aktiengesellschaft Adaptable antenna for a magnetic resonance apparatus including a wiper contact for varying the size of the antenna without frequency change
WO2001069276A2 (en) * 2000-03-10 2001-09-20 Mri Devices Corporation Coil configuration for nmr imaging and method of detecting magnetic fields in nmr imaging
US6512374B1 (en) * 1999-04-26 2003-01-28 Medrad, Inc. MR local imaging coil operable as a receive only or a transmit/receive coil
US20040189302A1 (en) * 2003-03-24 2004-09-30 Masaru Yoshida RF coil apparatus and magnetic resonance imaging apparatus
US20070252666A1 (en) * 2006-04-28 2007-11-01 Ruckus Wireless, Inc. PIN diode network for multiband RF coupling
US20080111548A1 (en) * 2006-11-09 2008-05-15 Hiroyuki Yamamoto Nmr probe and nmr spectrometer

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325351A2 (en) * 1988-01-19 1989-07-26 The Regents Of The University Of California Switchable MRI RF coil array with individual coils having different and overlapping fields of view
DE4030877A1 (en) * 1990-09-29 1992-04-02 Siemens Ag DOUBLE SURFACE COIL FOR A NUCLEAR MIRROR
US5280249A (en) * 1991-11-25 1994-01-18 Siemens Aktiengesellschaft Circularly polarizing local antenna for a nuclear magnetic resonance apparatus
JPH05249215A (en) * 1992-03-06 1993-09-28 Mitsuhiro Ono Loop gap resonator
US5606259A (en) * 1994-04-15 1997-02-25 Siemens Aktiengesellschaft Adaptable antenna for a magnetic resonance apparatus including a wiper contact for varying the size of the antenna without frequency change
US6512374B1 (en) * 1999-04-26 2003-01-28 Medrad, Inc. MR local imaging coil operable as a receive only or a transmit/receive coil
WO2001069276A2 (en) * 2000-03-10 2001-09-20 Mri Devices Corporation Coil configuration for nmr imaging and method of detecting magnetic fields in nmr imaging
US20040189302A1 (en) * 2003-03-24 2004-09-30 Masaru Yoshida RF coil apparatus and magnetic resonance imaging apparatus
US20070252666A1 (en) * 2006-04-28 2007-11-01 Ruckus Wireless, Inc. PIN diode network for multiband RF coupling
US20080111548A1 (en) * 2006-11-09 2008-05-15 Hiroyuki Yamamoto Nmr probe and nmr spectrometer

Also Published As

Publication number Publication date
WO2011135312A2 (en) 2011-11-03
GB201007198D0 (en) 2010-06-16

Similar Documents

Publication Publication Date Title
WO2011138150A3 (en) Detection of a metal or a magnetic object
EP2816367A3 (en) Single-beam radio frequency atomic magnetometer
WO2012129281A3 (en) Detection of targets using magnetic resonance
WO2015175047A3 (en) Optically detected magnetic resonance imaging with an electromagnetic field resonator
GB2567567A (en) Selected volume continuous illumination magnetometer
MX2017014426A (en) Radio frequency coil methods and apparatus.
BRPI1015098A2 (en) cryogenically cooled superconducting rf head coil arrangement and magnetic resonance imaging (mri) system using the same
BRPI1009856A2 (en) magnetic resonance system involving a superconducting main magnet, a gradient field coil and a cooled rf coil
WO2008117029A3 (en) Nfc communicators
WO2012055641A3 (en) Sensor apparatus, in particular metal sensor, with a field-compensated magnetic field sensor
WO2005109023A3 (en) Nqr rf coil assembly comprising two or more coils which may be made from hts
WO2008146256A3 (en) Integrated-circuit low-noise amplifier
MX2016003385A (en) Dual antenna for circular polarization.
GB201217427D0 (en) Target sensor
GB201311844D0 (en) Reduced Q low frequency antenna
WO2015091544A3 (en) Radio frequency safety switch with adjustable switching level for mri systems
WO2012110920A3 (en) Coil arrangement for a magnetic induction impedance measurement apparatus comprising a partly compensated magnetic excitation field in the detection coil
WO2011135312A3 (en) Mri rf coil with improved pin diode switch and reduced b1 distortions
WO2017087014A1 (en) Apparatus and method for hypersensitivity detection of magnetic field
Stockmann et al. Combined shim-RF array for highly efficient shimming of the brain at 7 Tesla
PL2154539T3 (en) Consumption meter with magnetic field detector
WO2014027271A3 (en) Magnetic field probe system with synchronous excitation for use in a magnetic resonance imaging system
WO2009126289A3 (en) Positive magnetic resonance imaging contrast methods and apparatus using chemical exchange saturation transfer
UA65098U (en) Method for calibration of a multi-channel skvid-magnetic meter
JP2018524111A (en) RF transmitter module with local field monitoring unit for magnetic resonance inspection system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11719865

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11719865

Country of ref document: EP

Kind code of ref document: A2