Computer controlled switching of multiple RF coils

Details Computer controlled switching of multiple RF coils Computer controlled switching of multiple RF coils

1990-11-21

1992-08-11

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

051382601

ABSTRACT:
A whole body RF antenna (22) surrounds an examination region (14). A localized coil array (40) having a plurality of coils (42a, 43b, . . . ) is mounted in the examination region. A switch array (48) selectively connects a selected one of the coils with an output (46). In a pilot or alignment scan, an imaging sequence is conducted using the whole body antenna (22) to generate an image of a portion of the surface coil array and the patient in the examination region. The coil array includes a marker (82) that is readily identifiable in the resultant image displayed on a video monitor (36). The location of slices for more detailed imaging are selected by positioning a cursor (64) on the video display. The position or coordinate system of the selected slices is aligned with the position or coordinate system of the coil array by positioning the cursor over the image of the marker and noting its position. Properties or parameters of each coil of the array are stored in a look up table (74). The parameters of each selected slice and imaging sequence are compared (72) with the properties in the look up table in order to determine an optimal one or more of the coils (42) for use in each imaging sequence. An imaging sequence along each of the slices is conducted utilizing the corresponding selected coils.

REFERENCES:
patent: 4728896 (1988-03-01), Bendall et al.
patent: 4812761 (1989-03-01), Vaughan
patent: 4825162 (1989-04-01), Roemer et al.
patent: 4881034 (1989-11-01), Kaufman et al.
patent: 4885541 (1989-12-01), Hayes
patent: 4975644 (1990-12-01), Fox
patent: 5086275 (1992-02-01), Roemer

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