Birdcage coils for simultaneous acquisition of spatial harmonics
In a magnetic resonance imaging apparatus, a main magnet assembly ( 12 ) produces a uniform magnetic field through an imaging region ( 14 ). An imaging region is defined within a subject by selecting gradient magnetic fields spatially encode the main magnetic field. A whole body birdcage radio frequ...
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| Main Authors | , , |
|---|---|
| Format | Patent |
| Language | English |
| Published |
18.12.2003
|
| Online Access | Get full text |
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| Summary: | In a magnetic resonance imaging apparatus, a main magnet assembly (
12
) produces a uniform magnetic field through an imaging region (
14
). An imaging region is defined within a subject by selecting gradient magnetic fields spatially encode the main magnetic field. A whole body birdcage radio frequency coil (
26
) excites magnetic resonance in dipoles of the subject. The resonance signals are received by the whole body coil (
26
) and by a second, local birdcage radio frequency coil (
16
). The first radio frequency coil (
26
) produces and is sensitive to a uniform radio frequency field in the imaging region (
14
) while the second radio frequency coil (
28
) is sensitive to a field that varies sinusoidally in space. From one radio frequency excitation, the two birdcage coils (
26, 16
) receive different sets of data with which to fill k-space, accelerating data collection. |
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