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:
Dec. 06, 1988
Filed:
Oct. 28, 1987
Hiroshi Nishimura, Kashiwa, JP;
Hitachi Medical Corp., Tokyo, JP;
Abstract
An NMR imaging device comprises a circuit for applying a static magnetic field to an object to be examined, a circuit for applying gradient magnetic fields to the object, a circuit for applying radio frequency pulses to the object to cause nuclear magnetic resonance (NMR) in atomic nuclei of atoms constituting tissue of the object, a circuit for detecting the NMR signals thus generated, and means for Fourier-transforming the NMR signals to reconstruct an NMR image. In this NMR imaging device, only a gradient magnetic field in the slice direction is applied to the object without applying a gradient magnetic field in the frequency encode direction and a gradient magnetic field in the phase encode direction, 90 degree and 180 degree radio frequency pulses are applied to the object at predetermined intervals, the NMR signals thus generated are detected and Fourier-transformed, and a static magnetic field intensity is detected from the resultant frequency spectrum to provide a suitable parameter for imaging, thereby providing the NMR image free from any position deviation.