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:
Jul. 27, 1999
Filed:
Feb. 10, 1997
Hitachi Medical Corporation, Tokyo, JP;
Abstract
The present invention intends to easily perform arithmetic operations for determining flow velocities without making phase correction and to reduce the aliasing error. To this end, a plurality of data pieces having phase sensitivity are measured using phase contrast pulse sequences in a magnetic resonance diagnostic apparatus. When four data pieces having phase sensitivity of tetrahedral type are acquired, four measured images are obtained. Individual measured images have vector values at corresponding points. Predetermined pair images are subjected to an arithmetic operation for determining an angle between two vectors at individual points on the images, the thus obtained phase images are added and a sum image is multiplied by a suitable coefficient to produce an x-direction flow velocity image. Flow velocity images in y and z directions are similarly obtained and images determining the magnitudes of flow velocities can also be produced.