RF coil assembly
View Patent ↗The present invention aims to provide an RF coil assembly capable of eliminating the need for connecting and disconnecting an electric path at decoupling portions and is an RF coil assembly including: a plurality of coil loops that are adjacent to each other in sequence and construct a phased array; and a plurality of decoupling device that cancel electromagnetic coupling between adjacent coil loops, respectively, wherein at least two of the plurality of coil loops are two coil loops that are adjacent to each other across a boundary where they can be decoupled from each other, and wherein at least one of the plurality of decoupling device is two coils that are connected in series to the two coil loops, respectively, and are opposed to each other across the boundary and form a pair of coils for decoupling.
1. A radio frequency (RF) coil assembly comprising:
a phased array comprising a plurality of RF coils, said plurality of RF coils comprising:
a plurality of coil loops in sequence defining a circumference; and
a plurality of decoupling devices configured to cancel an electromagnetic coupling between adjacent coil loops of said plurality of coil loops, said plurality of decoupling devices positioned about the circumference,
wherein at least two coil loops of said plurality of coil loops are adjacent to each other across a boundary such that said at least two coil loops can be decoupled, and
wherein at least one decoupling device of said plurality of decoupling devices comprises two coils connected in series to said at least two coil loops, and are opposed to each other across the boundary and form a pair of coils for decoupling; and
an elliptical shaped supporting body having an exterior surface coupled to said phased array, said elliptical shaped supporting body comprising:
a semi-elliptical shaped anterior supporting body portion; and
a semi-elliptical shaped posterior supporting body portion that is removably coupled to said anterior supporting body portion, said anterior and posterior supporting body portions configured to support said plurality of RF coils.
2. An RF coil assembly in accordance with claim 1 , wherein said phased array comprises a first RF coil, a second RF coil disposed adjacent to said first RF coil, and a first decoupling apparatus configured to cancel an electromagnetic field between said first and second RF coils.
3. An RF coil assembly in accordance with claim 2 , wherein said phased array further comprises a third RF coil, a fourth RF coil disposed adjacent to said third RF coil, and a second decoupling apparatus configured to cancel an electromagnetic field between said third and fourth RF coils.
4. An RF coil assembly in accordance with claim 3 , wherein said phased array further comprises:
a third decoupling apparatus configured to cancel an electromagnetic field between said second and said third RF coils; and
a fourth decoupling apparatus configured to cancel an electromagnetic field between said first and said fourth RF coils.
5. An RF coil assembly in accordance with claim 4 , wherein said first and said fourth RF coils are coupled to said anterior supporting body portion and said second and third RF coils are coupled to said posterior supporting body portion.
6. An RF coil assembly in accordance with claim 5 , wherein at least one of said first, second, third, and fourth decoupling apparatuses comprises:
a first coil; and
a second coil, said first and second coils are disposed in a direction that is perpendicular to a central axis of said supporting body.
7. An RF coil assembly in accordance with claim 6 , wherein said first coil comprises windings wound in a first direction and said second coil comprises windings wound in a second opposite direction to develop a mutual induction of opposite polarity between said first and second coils.
8. An RF coil assembly in accordance with claim 5 , wherein at least one of said first, second, third, and fourth decoupling apparatuses comprises:
a first coil; and
a second coil, said first and second coils are disposed in a direction that is parallel to a central axis of said supporting body.
9. An RF coil assembly in accordance with claim 8 , wherein said first coil comprises windings wound in a first direction and said second coil comprises windings wound in a second opposite direction to develop mutual induction of opposite polarity between said first and second coils.
10. An RF coil assembly in accordance with claim 1 , wherein said phased array comprises a first RF coil, a second RF coil disposed adjacent to said first RF coil, a third RF coil disposed adjacent to said second RF coil, and a fourth RF coil disposed adjacent said first and third RF coils.
11. An RF coil assembly in accordance with claim 10 , wherein said first RF coil, said second RF coil, said third RF coil, and said fourth RF coil each comprises an LCR circuit.
12. An RF coil assembly in accordance with claim 11 , wherein said first RF coil is coupled to said second RF coil by a mutual inductance.
13. An RF coil assembly in accordance with claim 12 , wherein said third RF coil is coupled to said fourth RF coil by a mutual inductance.