Transverse gradient coils for imaging the head

Details Transverse gradient coils for imaging the head Transverse gradient coils for imaging the head

A - Human Necessities

61

B

A61B 5/055 (2006.01) G01R 33/385 (2006.01)

Patent

CA 2070517

RD-20,936 TRANSVERSE GRADIENT COIL FOR IMAGING THE HEAD ABSTRACT Apparatus for producing a magnetic field gradient for magnetic resonant imaging of the head of a subject employs two fingerprint coils disposed apart from each other, creating a generally cylindrical cavity in which subject's head is placed. A power supply provides current through the two fingerprint coils. The fingerprint coils are comprised of concentric current-carrying paths with each path being elongated along the length of the cylindrical cavity on only one end. The shape and geometry of the fingerprint coils create a magnetic field gradient that has high linearity inside the cavity, and monotonically decreases outside the cavity, thereby minimizing artifacts introduced by the body of the subject.

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