RF RECEPTION COIL AND MAGNETIC RESONANCE IMAGING APPARATUS USING SAME
First Claim
1. An RF reception coil for receiving a magnetic resonance signal generated from a subject in response to receiving a radio frequency signal transmitted by an RF transmission coil in a magnetic resonance imaging apparatus, wherein:
- the RF reception coil is disposed in a bore formed by the RF transmission coil,the RF reception coil comprises a plurality of conductor loops,at least one of the conductor loops comprises;
at least one capacitor anda switch circuit that is connected to the capacitor in parallel, and controls electrical connection, andwhen the switch circuit is driven, the switch circuit makes the conductor loop having the switch circuit function as a magnetic field adjustment circuit that shields or enhances a magnetic field generated by the RF transmission coil.
4 Assignments
0 Petitions
Accused Products
Abstract
There is provided a technique for improving quality of images obtained with an MRI apparatus by using the geometric structures of the conventional RF transmission coil and RF reception coil and without increasing burden on patients or MRI technicians. A conductor loop of an RF reception coil disposed between a subject and an RF transmission coil is used also as a loop for magnetic field adjustment in order to shield or enhance a rotating magnetic field B1 generated by the RF transmission coil. Further, the conductor loop operated as a conductor loop for magnetic field adjustment among the conductor loops constituting the RF reception coil is driven so that inhomogeneity of the rotating magnetic field B1 is reduced.
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Citations
14 Claims
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1. An RF reception coil for receiving a magnetic resonance signal generated from a subject in response to receiving a radio frequency signal transmitted by an RF transmission coil in a magnetic resonance imaging apparatus, wherein:
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the RF reception coil is disposed in a bore formed by the RF transmission coil, the RF reception coil comprises a plurality of conductor loops, at least one of the conductor loops comprises; at least one capacitor and a switch circuit that is connected to the capacitor in parallel, and controls electrical connection, and when the switch circuit is driven, the switch circuit makes the conductor loop having the switch circuit function as a magnetic field adjustment circuit that shields or enhances a magnetic field generated by the RF transmission coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification