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:
May. 31, 1994
Filed:
May. 12, 1992
Jan A Den Hollander, Eindhoven, NL;
Peter R Luyten, Eindhoven, NL;
Reurt P Van Stapele, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A volume-selective magnetic resonance method for the determination of an MRI spectrum MR image, comprises a 90.degree. excitation pulse (p.sub.0) followed by two 180.degree. pulses (p.sub.1, p.sub.2,) the pulses (p.sub.0, p.sub.1, p.sub.2) being slice-selective. The magnetic resonance signal (SE) is sampled in the absence of magnetic field gradients and a spectrum is determined by way of Fourier transformation. In comparatively simple spin systems, J-refocusing is achieved for a specific choice of the echo time (TE), while only one J-coupling of more complex spin systems, comprising more than on J-coupling, is refocused by a specific choice of the echo time (TE). The method in accordance with the invention applies either a chemically selective 180.degree. pulse (p.sub.3) or a broadband 90.degree. pulse (p.sub.4) between the 180.degree. pulses (p.sub.1, p.sub.2). This causes J-refocusing to then occur, regardless the selected echo time (TE).