WO2007112003A3 - System and method for direct digitization of nmr signals - Google Patents

System and method for direct digitization of nmr signals Download PDF

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Publication number
WO2007112003A3
WO2007112003A3 PCT/US2007/007250 US2007007250W WO2007112003A3 WO 2007112003 A3 WO2007112003 A3 WO 2007112003A3 US 2007007250 W US2007007250 W US 2007007250W WO 2007112003 A3 WO2007112003 A3 WO 2007112003A3
Authority
WO
WIPO (PCT)
Prior art keywords
digital
signal
reference signal
excitation pulse
mixer
Prior art date
Application number
PCT/US2007/007250
Other languages
French (fr)
Other versions
WO2007112003A2 (en
Inventor
Andrzej Jesmanowicz
Original Assignee
Mcw Res Found Inc
Andrzej Jesmanowicz
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 Mcw Res Found Inc, Andrzej Jesmanowicz filed Critical Mcw Res Found Inc
Priority to EP07753846.0A priority Critical patent/EP1999480B1/en
Publication of WO2007112003A2 publication Critical patent/WO2007112003A2/en
Publication of WO2007112003A3 publication Critical patent/WO2007112003A3/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
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3621—NMR receivers or demodulators, e.g. preamplifiers, means for frequency modulation of the MR signal using a digital down converter, means for analog to digital conversion [ADC] or for filtering or processing of the MR signal such as bandpass filtering, resampling, decimation or interpolation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/24—Nuclear magnetic resonance, electron spin resonance or other spin effects or mass spectrometry

Abstract

A magnetic resonance imaging (MRI) system includes a transmitter (46) that produces an RF excitation pulse that is applied to a subject positioned in the MRI system to induce emission of at least one of an NMR signal and an ESR signal therefrom, and that produces a reference signal indicative of the phase of the RF excitation pulse. A first analog-to digital converter (84) has an input for receiving the reference signal that is synchronous with the RF excitation pulse. One or more additional analog-to-digital converters/processors (84) have inputs for receiving the at least one of NMR signals and ESR signals produced by a subject placed in the MRI system and produce one or more complex digital signal therefrom. A normalizer (90) is connected to receive and normalize the digital reference signal and a mixer is connected to receive the normalized digital reference signal and the digital signal. Accordingly, the mixer (PUXN) is operable to multiply the normalized complex digital reference signal with the complex digital signal.
PCT/US2007/007250 2006-03-24 2007-03-23 System and method for direct digitization of nmr signals WO2007112003A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07753846.0A EP1999480B1 (en) 2006-03-24 2007-03-23 System and method for direct digitization of nmr signals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US74373906P 2006-03-24 2006-03-24
US60/743,739 2006-03-24

Publications (2)

Publication Number Publication Date
WO2007112003A2 WO2007112003A2 (en) 2007-10-04
WO2007112003A3 true WO2007112003A3 (en) 2007-11-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/007250 WO2007112003A2 (en) 2006-03-24 2007-03-23 System and method for direct digitization of nmr signals

Country Status (3)

Country Link
US (2) US7807474B2 (en)
EP (1) EP1999480B1 (en)
WO (1) WO2007112003A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1999480B1 (en) * 2006-03-24 2015-07-08 The Medical College of Wisconsin, Inc. System and method for direct digitization of nmr signals
US8049505B2 (en) * 2006-12-19 2011-11-01 Koninlijke Philips Electronics N.V. MRI system with direct digital receiver using resampling
DE602008006775D1 (en) * 2007-12-11 2011-06-16 Koninkl Philips Electronics Nv IMPROVED TACT GENERATION IN MRI RECEIVERS
US8324897B2 (en) * 2009-11-11 2012-12-04 Agilent Technologies, Inc. Digital NMR signal processing systems and methods
US8593141B1 (en) 2009-11-24 2013-11-26 Hypres, Inc. Magnetic resonance system and method employing a digital squid
US8970217B1 (en) 2010-04-14 2015-03-03 Hypres, Inc. System and method for noise reduction in magnetic resonance imaging
KR101792261B1 (en) * 2011-09-30 2017-11-02 삼성전기주식회사 Power measurement device
DE102011086288B4 (en) * 2011-11-14 2014-10-09 Siemens Aktiengesellschaft Magnetic resonance imaging system, receiving device for such a system and method for obtaining an image signal in the system
EP2839305A1 (en) * 2012-04-16 2015-02-25 The Medical College of Wisconsin System and method for direct radio frequency phase control in magnetic resonance imaging
DE102014211137A1 (en) * 2014-06-11 2015-12-17 Siemens Aktiengesellschaft magnetic resonance device
DE102014216402B4 (en) 2014-08-19 2018-12-27 Siemens Healthcare Gmbh Signal processing in a magnetic resonance tomography device
WO2019094436A1 (en) * 2017-11-07 2019-05-16 Champaign Imaging Functional magnetic resonance imaging with direct dipole decomposition
US20210128077A1 (en) * 2018-04-11 2021-05-06 Cornell University Up-sampling of signals by analytic phase projection

Citations (1)

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Also Published As

Publication number Publication date
US7807474B2 (en) 2010-10-05
EP1999480A2 (en) 2008-12-10
WO2007112003A2 (en) 2007-10-04
US20070224698A1 (en) 2007-09-27
US8021892B2 (en) 2011-09-20
EP1999480B1 (en) 2015-07-08
US20100321085A1 (en) 2010-12-23

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