Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1998-10-01
2000-03-14
Lateef, Marvin M.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
324309, A61B 5055
Patent
active
060384662
ABSTRACT:
The invention relates to a magnetic resonance (MR) imaging method for forming images of a part of a human or animal body which is arranged in a steady magnetic field, an MR image being made of the part which is directed transversely to a major axis of an ellipsoid which approximates the part. The method is used, for example for functional examination of a heart of a human body during which MR images are made of the left ventricle of the heart. Because the heart in every body may be oriented differently relative to a feet-to-head axis and relative to an axis transversely to the feet-to-head axis, the major axis of the ellipsoid should be determined so as to enable an MR image to be formed of an imaging plane which extends transversely of the major axis and contains a minor axis of the ellipsoid. To this end, two MR images are made of a first imaging plane and a second imaging plane of the heart, respectively, the first imaging plane and the second imaging plane being chosen in such a manner that they extend transversely to the feet-to-head axis of the body. Subsequently, a first reference and a second reference are determined in the first and the second MR image, respectively, said references being characterized by one and the same property in the MR images. The estimate of the major axis of the ellipsoid is then determined by a connecting line through two points which correspond to the first reference and the second reference, respectively.
REFERENCES:
patent: 5107838 (1992-04-01), Yamaguchi
patent: 5360006 (1994-11-01), Geiser et al.
patent: 5361763 (1994-11-01), Kao et al.
patent: 5427100 (1995-06-01), Higashi et al.
patent: 5669382 (1997-09-01), Curwen et al.
Lateef Marvin M.
Mantis Mercader Eleni
Renfrew Dwight H.
U.S. Philips Corporation
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