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1. (WO2018020905) MAGNETIC RESONANCE IMAGING DEVICE AND CONTROL METHOD THEREOF
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Pub. No.: WO/2018/020905 International Application No.: PCT/JP2017/022632
Publication Date: 01.02.2018 International Filing Date: 20.06.2017
IPC:
A61B 5/055 (2006.01) ,G01R 33/48 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
5
Measuring for diagnostic purposes; Identification of persons
05
Measuring for diagnosis by means of electric currents or magnetic fields
055
involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
44
using nuclear magnetic resonance (NMR)
48
NMR imaging systems
Applicants:
株式会社日立製作所 HITACHI, LTD. [JP/JP]; 東京都千代田区丸の内一丁目6番6号 6-6,Marunouchi 1-chome,Chiyoda-ku, Tokyo 1008280, JP
Inventors:
花田 光 HANADA,Hikaru; JP
坂口 直哉 SAKAGUCHI,Naoya; JP
佐藤 善隆 SATO,Yoshitaka; JP
西尾 慧祐 NISHIO,Keisuke; JP
Agent:
ポレール特許業務法人 POLAIRE I.P.C.; JP
Priority Data:
2016-14728727.07.2016JP
Title (EN) MAGNETIC RESONANCE IMAGING DEVICE AND CONTROL METHOD THEREOF
(FR) DISPOSITIF D’IMAGERIE PAR RÉSONANCE MAGNÉTIQUE ET SON PROCÉDÉ DE COMMANDE
(JA) 磁気共鳴イメージング装置及びその制御方法
Abstract:
(EN) In this MRI device, which performs imaging involving applying an MPG pulse, extension of TE is suppressed to obtain high-quality diffusion weighted images in real time. To this end, in this magnetic resonance imaging device, which applies an MPG pulse after applying an excitation RF pulse and collects echo signals from a prescribed time after the excitation RF pulse, during the period after applying the MPG pulse up to collection of the echo signals, at least navigation echoes in the slice direction are acquired, a phase correction amount is calculated from the acquired navigation echoes, and, on the basis of the calculated phase correction amount, a corrective gradient magnetic field is applied which corrects the phase error included in the MPG pulse.
(FR) La présente invention concerne un dispositif d'IRM qui exécute une imagerie entraînant l’application d’une impulsion de GMI, l’extension de TE étant supprimée pour obtenir les images pondérées de diffusion de haute qualité en temps réel. Ledit dispositif d’imagerie par résonance magnétique, qui applique une impulsion de GMI après l’application d’une impulsion RF d’excitation et qui recueille des signaux d’écho pendant un laps de temps prescrit après l’impulsion RF d’excitation, pendant la période après l’application de l’impulsion de GMI jusqu’à la collecte des signaux d’écho, au moins des échos de navigation dans le sens de la tranche sont acquis, une quantité de correction de phase est calculée à partir des échos de navigation acquis et, sur la base de la quantité de correction de phase calculée, un champ magnétique à gradient de correction est appliqué qui corrige l’erreur de phase comprise dans l’impulsion de GMI.
(JA) MPGパルス印加を含む撮像を行うMRI装置において、TEの延長を抑えてリアルタイムで高画質な拡散強調画像を得る。そのために、励起RFパルス印加後にMPGパルスを印加し、励起RFパルスから所定時間後にエコー信号を収集する磁気共鳴イメージング装置において、MPGパルス印加後にエコー信号収集までの間に、少なくともスライス方向のナビゲーションエコーを取得し、取得したナビゲーションエコーから位相補正量を算出し、算出した位相補正量に基き、MPGパルスに含まれる位相誤差を補正する補正傾斜磁場を印加する。
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Designated 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, 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
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)