Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1989-08-11
1991-09-03
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
G01R 3320
Patent
active
050457926
ABSTRACT:
Radio frequency signals are introduced into a patient and magnetic resonance signals are received from the patient by a head probe (22) of a magnetic resonance apparatus. The head probe includes an upper probe portion (60) and a lower probe portion (62) which are selectively separable. The upper probe portion has a window (66) of about 90.degree. at the top so the patient can see out easily and feel less claustrophobic. The upper and lower probe portions each include two coil sections (50, 52; 54, 56) connected in series. The coil sections include a plurality of conductor branches (40) connected in parallel around a cylinder. The position of the conductor branches is arbitrarily selected to accommodate the patient window and the like. From the Biot-Savart Law, the current flow through each of the conductor branches is determined. Capacitors C.sub.1, . . . , C.sub.n are connected into the current branches such that actual current flow I.sub.0, I.sub.1, . . . , i.sub.n through each branch substantially meets the currents specified by the Biot-Savart Law.
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IEEE Standard Dictionary of Electrical and Electronics Terms; Third Edition, Editor, F. Jay, p. 516, 1984.
Picker International Inc.
Tokar Michael J.
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