Magnetic resonance signal receiving apparatus and magnetic resonance imaging apparatus
First Claim
Patent Images
1. A magnetic resonance signal receiving apparatus comprising:
- a plurality of receiver coil units disposed with respect to each other to define a phase array, each unit of said plurality of receiver coils defining a loop;
a plurality of capacitors each provided in series in each loop of each unit of said plurality of receiver coils;
a plurality of first diodes;
a plurality of inductors each connected in parallel to each of said plurality of capacitors in each said loop through a pair of said plurality of first diodes connected in parallel in opposing polarity to each other;
a plurality of second diodes each provided in series in said loop of each unit of said plurality of receiver coils; and
means for enabling selective ones of said units of said plurality of receiver coils and for disabling others of said units of said plurality of receiver coils by independently and selectively controlling bias of said plurality of said second diodes provided in said loop of each unit of said plurality of receiver coils so that signals received by said units of said plurality of receiver coils are selectively controlled in desired combinations to thereby simplify signal receipt, said means being connected to each unit of said plurality of receiver coils and to each of said plurality of second diodes connected in said loop thereof.
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Abstract
In order to provide a magnetic resonance signal receiving apparatus with simplified arrangement of a coil loop selecting means, an active disabling circuit by the diode and a passive disabling circuit by the inductor connected in parallel to the capacitor through a pair of inverted heading parallel diodes are provided to a plurality of unit coils forming a phased array, the active disabling circuit will be controlled by the bias driver unit.
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Citations
12 Claims
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1. A magnetic resonance signal receiving apparatus comprising:
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a plurality of receiver coil units disposed with respect to each other to define a phase array, each unit of said plurality of receiver coils defining a loop;
a plurality of capacitors each provided in series in each loop of each unit of said plurality of receiver coils;
a plurality of first diodes;
a plurality of inductors each connected in parallel to each of said plurality of capacitors in each said loop through a pair of said plurality of first diodes connected in parallel in opposing polarity to each other;
a plurality of second diodes each provided in series in said loop of each unit of said plurality of receiver coils; and
means for enabling selective ones of said units of said plurality of receiver coils and for disabling others of said units of said plurality of receiver coils by independently and selectively controlling bias of said plurality of said second diodes provided in said loop of each unit of said plurality of receiver coils so that signals received by said units of said plurality of receiver coils are selectively controlled in desired combinations to thereby simplify signal receipt, said means being connected to each unit of said plurality of receiver coils and to each of said plurality of second diodes connected in said loop thereof. - View Dependent Claims (2, 3, 4, 5)
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6. A magnetic resonance imaging apparatus comprising:
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first means for forming a static magnetic field in a space for placement of an imaging object;
second means for forming a gradient magnetic field in said space;
third means for forming radio frequency magnetic field in said space;
fourth means for measuring magnetic resonance signal emanating from said space; and
fifth means for generating images on basis of said measured magnetic resonance signal;
wherein said fourth means comprises;
a plurality of receiver coil units disposed with respect to each other to define a phase array, each unit of said plurality of receiver coils defining a loop;
a plurality of capacitors each provided in series in each loop of each unit of said plurality of receiver coils;
a plurality of first diodes;
a plurality of inductors each connected in parallel to each of said plurality of capacitors in each said loop through a pair of said plurality of first diodes connected in parallel in opposing polarity to each other;
a plurality of second diodes each provided in series in said loop of each unit of said plurality of receiver coils; and
means for enabling selective ones of said units of said plurality of receiver coils and for disabling others of said units of said plurality of receiver coils by independently and selectively controlling bias of said plurality of said second diodes provided in said loop of each unit of said plurality of receiver coils so that signals received by said units of said plurality of receiver coils are selectively controlled in desired combinations to thereby simplify signal receipt, said means being connected to each unit of said plurality of receiver coils and to each of said plurality of second diodes connected to said loop thereof. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification