Title:
磁気共鳴イメージング用RFコイル
Document Type and Number:
Japanese Patent JP4266580
Kind Code:
B2
Abstract:
A radio frequency (RF) coil system for resonance imaging/analysis comprising a primary coil element having a plurality of axial conductors spaced to form a generally tubular structure having two ends and defining a coil volume, and a first pair of spoiler coils. The first pair of spoiler coils each comprising a plurality of axial conductors spaced to form a generally tubular structure and defining a coil volume. Each of the spoiler coils is positioned adjacent to and overlapping an end of the primary coil. Each of the primary and spoiler coils is also adapted to carry an RF signal, wherein the signal in the spoiler coils is 180 degrees out of phase with the signal in the primary coil. The counter-phased spoiler coils act to rapidly drive down the RF magnetic field generated by the primary coil in the region of the ends of the primary coil to reduce the occurrence of aliasing artifacts from outside the imaging field of view.
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Inventors:
Eddie Bee Boskamp
Application Number:
JP2002191597A
Publication Date:
May 20, 2009
Filing Date:
July 01, 2002
Export Citation:
Assignee:
GE Medical Systems Global Technology Company LLC
International Classes:
A61B5/055; G01R33/34; H01F5/00
Domestic Patent References:
| JP7023923A | ||||
| JP10075939A | ||||
| JP7308304A | ||||
| JP11089812A | ||||
| JP11505759A | ||||
| JP531092U |
Foreign References:
| EP1921461A1 |
Attorney, Agent or Firm:
Kenichi Matsumoto