TOP > 外国特許検索 > NUCLEAR MAGNETIC RESONANCE APPARATUS, MAGNETIC RESONANCE IMAGING APPARATUS, NUCLEAR MAGNETIC RESONANCE METHOD, MAGNETIC RESONANCE IMAGING METHOD, METHOD FOR DETERMINING MEASUREMENT CONDITIONS, AND PROGRAM

NUCLEAR MAGNETIC RESONANCE APPARATUS, MAGNETIC RESONANCE IMAGING APPARATUS, NUCLEAR MAGNETIC RESONANCE METHOD, MAGNETIC RESONANCE IMAGING METHOD, METHOD FOR DETERMINING MEASUREMENT CONDITIONS, AND PROGRAM NEW

外国特許コード F190009972
整理番号 (S2018-0300-N0)
掲載日 2019年10月28日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2019JP008240
国際公開番号 WO 2019168188
国際出願日 平成31年3月1日(2019.3.1)
国際公開日 令和元年9月6日(2019.9.6)
優先権データ
  • 特願2018-036934 (2018.3.1) JP
発明の名称 (英語) NUCLEAR MAGNETIC RESONANCE APPARATUS, MAGNETIC RESONANCE IMAGING APPARATUS, NUCLEAR MAGNETIC RESONANCE METHOD, MAGNETIC RESONANCE IMAGING METHOD, METHOD FOR DETERMINING MEASUREMENT CONDITIONS, AND PROGRAM NEW
発明の概要(英語) This nuclear magnetic resonance apparatus (100) is provided with: a static magnetic field formation unit (10) for forming a static magnetic field; a subject holding unit (2) for holding a subject in the static magnetic field; a pulse application unit (51a) for applying a π/2 pulse of the Larmor frequency of an atom to be measured to the subject in the static magnetic field, and then, starting at a time point at which half a predetermined time has passed after application of the π/2 pulse, applying a π pulse of the Larmor frequency to the subject at least a predetermined number of times (the predetermined number being at least 2) at intervals of the predetermined time; and a detection unit (40) for detecting the signal intensity of a spin echo signal generated from the subject as a result of the last instance of the predetermined number of times of application of the π pulse.
従来技術、競合技術の概要(英語) BACKGROUND ART
Magnetic resonance imaging (MRI: Magnetic Resonance Imaging) apparatus, nuclear magnetic resonance (NMR: Nuclear Magnetic Resonance) of information inside the sample using the phenomenon known as to form an image.
Nuclear magnetic resonance, the static magnetic field direction as the axis with respect to the nuclear spin precession, the precession frequency (Larmor frequency) of the same frequency as that generated when the pulse is applied. Is applied to the sample obtained by such a pulse, the pulse with respect to the nuclear spin of a nucleus is included in the sample based on the response signal from the generated images of the sample, referred to as MRI image. For example, by the resonance state has been changed returns to the original state of the nuclear spin is the characteristics of the relaxation phenomenon, depending on the situation of the nuclear spins. Therefore, such a relaxation phenomenon MRI apparatus based on the nuclear magnetization distribution in the image imaged by the MRI can be obtained.
Relaxation phenomenon, the static magnetic field direction of the nuclear spins (Z direction) and longitudinal relaxation according to the component, the rotation direction (XY direction) and transverse relaxation according to the components separated. Longitudinal relaxation and the transverse relaxation, the relaxation time constant of the respective functions of the T1, T2 also referred to as relaxation.
As a conventional MRI apparatus, as shown in Fig. 10 of the pulse train, the excitation pulse as the π / 2 (90° pulse) and pulse, the inverted pulse as the π pulse (the pulse 180°) and spaced apart by a certain period of time τ is applied, further after the lapse of τ the Hahn-echo observed in the (spin echo) on the basis of the, longitudinal relaxation contrast by the nuclear magnetization distribution with a T1 weighted image and the image of, a transverse relaxation contrast by the nuclear magnetization distribution image obtained by imaging with the enhanced image T2 is obtained (for example, Patent Document 1) is. However, mainly in the practical imaging time from request T1 is not generally obtained by the image enhancement.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • NIIGATA UNIVERSITY
  • 発明者(英語)
  • SASAKI Susumu
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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