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:
Mar. 29, 1994
Filed:
Nov. 25, 1992
Hiroshi Sugimoto, Utsunomiya, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A magnetic resonance imaging method capable of discriminating the flow directions of fluids, such as bloodstreams, and suitable for MR angiography first selectively excites two side regions, which are located in the vicinity of a region to be imaged including fluids in an object to be examined, and which include first and second fluids flowing into the region to be imaged along different directions, by using RF pulses (90.degree. pulses) different from each other in phase by 90.degree.. A spin in one side region is rotated to the x'-axis direction in a rotating coordinate system, and that in the other side region is rotated to the y'-axis direction in the system. A 180.degree. pulse is applied to the region to be imaged to invert the polarity of a spin, thereby generating MR signals. The acquired MR signals are subjected to quadrature detection, and MR images are reconstructed for both a real-part component and an imaginary-part component different from each other in phase by 90.degree.. In each of the two images, only a fluid flowing in one direction appears. The flow directions of the fluids can be discriminated by comparing the two images.