Magnetic field-generating device for magnetic particle imaging
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01R-033/383
H01F-007/02
A61B-005/05
출원번호
15761772
(2016-09-21)
등록번호
10656224
(2020-05-19)
우선권정보
DE-10 2015 218 122 (2015-09-21)
국제출원번호
PCT/EP2016/072342
(2016-09-21)
국제공개번호
WO2017/050789
(2017-03-30)
발명자
/ 주소
Buzug, Thorsten
Weber, Matthias
출원인 / 주소
Universitat Zu Lubeck
대리인 / 주소
Diederiks & Whitelaw, PLC.
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
Disclosed is a device for simply creating a magnetic gradient field having a field-free line (FFL). The device comprises two ring-shaped Halbach arrays formed of permanent magnets, and preferably also a coil arrangement for electrically generating a homogeneous magnetic field for shifting the FFL in
Disclosed is a device for simply creating a magnetic gradient field having a field-free line (FFL). The device comprises two ring-shaped Halbach arrays formed of permanent magnets, and preferably also a coil arrangement for electrically generating a homogeneous magnetic field for shifting the FFL in a predetermined plane. The FFL can be rotated together with the Halbach array in the plane, without the coil arrangement having to be rotated or moved. The invention is suitable for effective construction of a scanning device for magnetic particle imaging (MPI).
대표청구항▼
1. A magnetic-field generating device exhibiting two structurally identical Halbach rings, formed from permanent magnets, of the Halbach order k=2 having in each case a predetermined inside diameter ID and outside diameter AD and predetermined ring width R and magnetization direction, characterized
1. A magnetic-field generating device exhibiting two structurally identical Halbach rings, formed from permanent magnets, of the Halbach order k=2 having in each case a predetermined inside diameter ID and outside diameter AD and predetermined ring width R and magnetization direction, characterized in that: the Halbach rings having a center-point distance M greater than the ring width R and smaller than the outside diameter AD are arranged symmetrically relative to a plane of symmetry, with projections of the magnetization directions onto the plane of symmetry pointing in opposite directions; and a coil arrangement, preferably a Helmholtz coil pair, formed for generating a homogenous magnetic field having the field direction at right angles to the plane of symmetry of the Halbach rings at least in a part area of the plane of symmetry. 2. The magnetic-field generating device according to claim 1, characterized in that the Halbach rings exhibit inside diameters ID greater than two ring widths R and are arranged at a center-point distance M greater than half the inside diameter ID. 3. The magnetic-field generating device according to claim 1, characterized in that the Halbach rings are arranged coaxially. 4. The magnetic-field generating device according to claim 1, characterized in that the symmetric arrangement of the Halbach rings exhibits a predetermined tilting angle of the ring axes greater than zero relative to the normal of the plane of symmetry. 5. The magnetic-field generating device according to claim 4, characterized in that the tilting angle is predetermined from the interval 5° to 15°. 6. The magnetic-field generating device according to claim 1, characterized by a unit designed for temporally periodically energizing the coil arrangement. 7. The magnetic-field generating device according to claim 1, characterized in that the Halbach rings are mounted so as to be rotatable about their ring axes. 8. The magnetic-field generating device according to claim 7, characterized by a mechanical gear for transmitting the rotation of one Halbach ring to the other while maintaining the opposite magnetization directions of the Halbach rings. 9. Use of a device according to claim 1 for generating a selection field for Magnetic Particle Imaging. 10. The magnetic-field generating device according to claim 2, characterized in that the Halbach rings are arranged coaxially. 11. The magnetic-field generating device according to claim 2, characterized in that the symmetric arrangement of the Halbach rings exhibits a predetermined tilting angle of the ring axes greater than zero relative to the normal of the plane of symmetry. 12. The magnetic-field generating device according to claim 2, characterized by a coil arrangement, preferably a Helmholtz coil pair, formed for generating a homogenous magnetic field having the field direction at right angles to the plane of symmetry of the Halbach rings at least in a part area of the plane of symmetry. 13. The magnetic-field generating device according to claim 3, characterized by a coil arrangement, preferably a Helmholtz coil pair, formed for generating a homogenous magnetic field having the field direction at right angles to the plane of symmetry of the Halbach rings at least in a part area of the plane of symmetry. 14. The magnetic-field generating device according to claim 4, characterized by a coil arrangement, preferably a Helmholtz coil pair, formed for generating a homogenous magnetic field having the field direction at right angles to the plane of symmetry of the Halbach rings at least in a part area of the plane of symmetry. 15. The magnetic-field generating device according to claim 5, characterized by a coil arrangement, preferably a Helmholtz coil pair, formed for generating a homogenous magnetic field having the field direction at right angles to the plane of symmetry of the Halbach rings at least in a part area of the plane of symmetry. 16. The magnetic-field generating device according to claim 2, characterized in that the Halbach rings are mounted so as to be rotatable about their ring axes. 17. The magnetic-field generating device according to claim 3, characterized in that the Halbach rings are mounted so as to be rotatable about their ring axes. 18. The magnetic-field generating device according to claim 4, characterized in that the Halbach rings are mounted so as to be rotatable about their ring axes. 19. The magnetic-field generating device according to claim 5, characterized in that the Halbach rings are mounted so as to be rotatable about their ring axes.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.