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:
Jan. 02, 2001
Filed:
Jul. 15, 1998
Shigeru Watanabe, Ibaraki-ken, JP;
Tetsuhiko Takahashi, Souka, JP;
Hitachi Medical Corporation, , JP;
Abstract
The MRI apparatus of the present invention performs a pulse sequence for applying successively 180° pulses,. . . after application of a 90° pulse,at constant intervals and applying readout magnetic fields,during the interval between pairs of 180° pulses while the polarity of the magnetic field,is inverted several times to collect a plurality of gradient echo signals that are phase encoded differently. Here, the application of the readout gradient magnetic field is controlled such that generation of the gradient echo signals does ot coincide with generation of the spin echo signal. The image reconstruction is performed by using only T2* weighted gradient echo signals to obtain images reflecting difference in magnetic susceptibility and inhomogeneities in local magnetic fields.