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1. (WO2018033548) ACTIVELY SHIELDED GRADIENT COIL ASSEMBLY FOR A MAGNETIC RESONANCE EXAMINATION SYSTEM
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2018/033548 International Application No.: PCT/EP2017/070693
Publication Date: 22.02.2018 International Filing Date: 15.08.2017
IPC:
G01R 33/385 (2006.01) ,G01R 33/421 (2006.01)
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
28
Details of apparatus provided for in groups G01R33/44-G01R33/6496
38
Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
385
using gradient magnetic field coils
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
28
Details of apparatus provided for in groups G01R33/44-G01R33/6496
42
Screening
421
of main or gradient magnetic field
Applicants: KONINKLIJKE PHILIPS N.V.[NL/NL]; High Tech Campus 5 5656 AE Eindhoven, NL
Inventors: OVERWEG, Johannes, Adrianus; NL
Agent: COHEN, Julius, Simon; NL
DE HAAN, Poul, Erik; NL
Priority Data:
16184173.915.08.2016EP
Title (EN) ACTIVELY SHIELDED GRADIENT COIL ASSEMBLY FOR A MAGNETIC RESONANCE EXAMINATION SYSTEM
(FR) ENSEMBLE BOBINE DE GRADIENT ACTIVEMENT PROTÉGÉ POUR UN SYSTÈME D'EXAMEN PAR RÉSONANCE MAGNÉTIQUE
Abstract:
(EN) A gradient coil assembly for a magnetic resonance examination system and comprises a conical end-flange surface between the primary cylindrical surface and the shield cylindrical surface at their adjacent axial ends. Interconnecting winding portions between the primary windings and the shield windings disposed on the conical surface and serially connecting at least some of the shield windings to some of the primary windings. This tapered connection reduces the radially outwad stray gradient magnetic field. The winding portions over the conical surface are largely insensitive to discretisation errors.
(FR) L'invention concerne un ensemble bobine de gradient pour un système d'examen par résonance magnétique qui comprend une surface de bride d'extrémité conique entre la surface cylindrique primaire et la surface cylindrique de protection, au niveau de leurs extrémités axiales adjacentes. Des parties d'enroulement d'interconnexion, entre les enroulements primaires et les enroulements de protection, sont disposées sur la surface conique et relient en série au moins certains des enroulements de protection à certains des enroulements primaires. Cette connexion effilée réduit le champ magnétique rayonné radialement vers l'extérieur. Les parties d'enroulement recouvrant la surface conique sont en grande partie insensibles à des erreurs de discrétisation.
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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, 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
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: English (EN)
Filing Language: English (EN)