Magnetic resonance imaging apparatus in which gradient echo signals are acquired at a time distant from the center of a gradient echo

Patent 5869964 Issued on February 9, 1999. Estimated Expiration Date:

January 9, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Application

No. 780898 filed on 01/09/1997

US Classes:

324/309, To obtain localized resonance within a sample324/307Using a nuclear resonance spectrometer system

Examiners

Primary: Arana, Louis

Attorney, Agent or Firm

Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

International Class

G01V 003/00

Foreign Application Priority Data

1993-09-14 JP

Abstract

A magnetic resonance imaging apparatus capable of obtaining a brain functional image without spending much time and of facillitating to distinguish a vein portion from a cortex portion. The magnetic resonance imaging apparatus includes: a first unit which acquires at least one of data emphasizing a signal from a blood portion in a region of interest in a biological body to be examined and data least affected by inhomogeneity of a static magnetic field; a second unit which acquires data in which a change of magnetic field inhomogeneity (T2 *) in the region of interest is emphasized; and a control unit which executes simultaneously the first acquiring unit and the second acquiring unit during a predetermined pulse sequence after a radio-frequency magnetic field is applied to the biological body.