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1. (WO2019049549) MAGNETIC RESONANCE IMAGING APPARATUS AND NOISE ELIMINATION METHOD
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Pub. No.: WO/2019/049549 International Application No.: PCT/JP2018/028301
Publication Date: 14.03.2019 International Filing Date: 27.07.2018
IPC:
A61B 5/055 (2006.01) ,G01N 24/00 (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
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
24
Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
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:
白猪 亨 SHIRAI, Toru; JP
佐藤 良太 SATOH, Ryota; JP
鎌田 康弘 KAMADA, Yasuhiro; JP
瀧澤 将宏 TAKIZAWA, Masahiro; JP
五月女 悦久 SOTOME, Yoshihisa; JP
Agent:
特許業務法人 山王坂特許事務所 SANNOZAKA PATENT LAW FIRM; 神奈川県横浜市神奈川区鶴屋町2丁目26番地2 第4安田ビル9階 4th Yasuda Building 9F, 26-2, Tsuruyacho 2-chome, Kanagawa-ku, Yokohama-shi, Kanagawa 2210835, JP
Priority Data:
2017-17227407.09.2017JP
Title (EN) MAGNETIC RESONANCE IMAGING APPARATUS AND NOISE ELIMINATION METHOD
(FR) APPAREIL D'IMAGERIE PAR RÉSONANCE MAGNÉTIQUE ET PROCÉDÉ D’ÉLIMINATION DE BRUIT
(JA) 磁気共鳴イメージング装置およびノイズ除去方法
Abstract:
(EN) The purpose of the present invention is to eliminate, with high precision, noise from separation images which are obtained by separating spatially overlapping signals by means of a PI-method in an image acquired by MRI using a plurality of receiving coils. From nuclear magnetic resonance signals received by a plurality of receiving coils, a measurement is taken of a complex image that includes spatial overlaps, and, by using sensitivity information of the receiving coils, spatially overlapping signals are separated and a plurality of separation images are calculated. Then, noise is eliminated on the basis of correlations of noise mixed in the respective separation images.
(FR) La présente invention vise à éliminer, avec une grande précision, le bruit d'images de séparation qui sont obtenues en séparant des signaux à chevauchement spatial au moyen d'un procédé PI dans une image acquise par IRM à l'aide d'une pluralité de bobines de réception. À partir de signaux de résonance magnétique nucléaire reçus par une pluralité de bobines de réception, une mesure est prise d'une image complexe qui comprend des chevauchements spatiaux et, en utilisant des informations de sensibilité des bobines de réception, des signaux à chevauchement spatial sont séparés et une pluralité d'images de séparation sont calculées. Ensuite, le bruit est éliminé sur la base de corrélations de bruit mélangé dans les images de séparation respectives.
(JA) MRIを用いて複数の受信コイルを用いて取得した画像において、PI法を用いて空間的に重なり合った信号を分離した分離画像のノイズを精度よく除去する。 複数の受信コイルで受信した核磁気共鳴信号から、空間的に重なり合った複素画像を計測し、複数の受信コイルの感度情報を使って、空間的に重なり合った信号を分離して複数の分離画像を算出する。そして、各分離画像に混入したノイズの相関に基づいてノイズを除去する。
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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)