The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 1984
Filed:
Jan. 20, 1982
Waldo S Hinshaw, Richmond Heights, OH (US);
National Research Development Corporation, London, GB;
Abstract
Spatially discriminated information is obtained by appropriate processing of data derived from a series of pulsed N.M.R. operations performed with a magnetic field exhibiting a linear gradient whose magnitude is different for each operation. In obtaining a two-dimensional image of spin density distribution, coil sets (5 and 6) are used to generate magnetic field components giving x and y gradients, the former being changed stepwise in magnitude and the latter being fixed. For each value of x gradient, the sample (1) is irradiated with pulsed r.f. energy, resultant N.M.R. signals being detected by phase-sensitive detectors (19 and 20) whose outputs are regularly sampled by A-D converters (25 and 26). Processing of the complete sampled data by a computer (12) involves both Fourier transformation with respect to x gradient magnitude and Fourier transformation with respect to time. For sectional images a third coil set (7) is used to generate a component giving an alternating z gradient and the irradiation consists of a train of pulses.