Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2011-07-12
2011-07-12
Arana, Louis M (Department: 2858)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S320000, C335S296000
Reexamination Certificate
active
07977946
ABSTRACT:
A magnet assembly primarily for use in MRI Interventional applications having an array of four mam permanent magnets that are spaced-apart and arranged into a ring-like geometry with six easy-access openings The magnetization direction in each permanent magnet is anti-parallel to any other adjacent permanent magnet in the πng assembly while it is parallel to any other permanent magnet in the array that is oppositely located just as in a quadrupolar system Such an arrangement has the advantage of concentrating the magnetic field inside the nng enclosure while minimizing magnetic field generated outside Together, these four spatially spaced-apart permanent magnets create a very homogeneous and strong magnetic field in the central enclosure with two orthogonal access paths and one parallel access path to the enclosure Through one access pathway a patient can be inserted while through the other pathways a doctor can fully access the patient.
REFERENCES:
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patent: 5438264 (1995-08-01), Takeshima et al.
patent: 6680663 (2004-01-01), Lee et al.
patent: 6940378 (2005-09-01), Miller et al.
Lian Jianyu
Teklemariam Grum
Arana Louis M
Bay State IP
Bruno Adam J.
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