Cavity resonator for magnetic resonance systems
First Claim
1. A radio frequency (RF) device for magnetic resonance imaging, the RF device comprising:
- a resonator coil having two or more separable sections. the sections adapted to be disposed circumferentially about an axis to form the coil, the coil defining a cavity therethrough,each of the two or more sections including at least one transmission line segment,the two or more sections being reactively coupled when disposed to form the coil, the reactive coupling configured such that excitation energy applied to any one of the two or more sections causes excitation energy in the remaining sections,the two or more sections adapted to form an electromagnetic shield when disposed to form the coil,wherein the at least one transmission line segment comprises an inner conductor and an outer shield portion, the outer shield portion being formed of a non-magnetic conductive material, andwherein at least one separable section includes an outer shield portion which overlaps an outer shield portion of an adjacent separable section.
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Accused Products
Abstract
An magnetic resonance apparatus in embodiments of the invention may include one or more of the following features: (a) a coil having at least two sections, (b) the at least two sections having a resonant circuit, (c) the at least two sections being reactively coupled or decoupled, (d) the at least two sections being separable, (e) the coil having openings allowing a subject to see or hear and to be accessed through the coil, (f) a cushioned head restraint, and (g) a subject input/output device providing visual data to the subject, the input/output device being selected from the group consisting of mirrors, prisms, video monitors, LCD devices, and optical motion trackers.
117 Citations
13 Claims
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1. A radio frequency (RF) device for magnetic resonance imaging, the RF device comprising:
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a resonator coil having two or more separable sections. the sections adapted to be disposed circumferentially about an axis to form the coil, the coil defining a cavity therethrough, each of the two or more sections including at least one transmission line segment, the two or more sections being reactively coupled when disposed to form the coil, the reactive coupling configured such that excitation energy applied to any one of the two or more sections causes excitation energy in the remaining sections, the two or more sections adapted to form an electromagnetic shield when disposed to form the coil, wherein the at least one transmission line segment comprises an inner conductor and an outer shield portion, the outer shield portion being formed of a non-magnetic conductive material, and wherein at least one separable section includes an outer shield portion which overlaps an outer shield portion of an adjacent separable section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification