Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2002-05-10
2004-02-17
Mercader, Elenimantis (Department: 3737)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
C600S419000, C382S128000, C382S130000, C324S307000, C324S309000, C324S310000, C324S313000, C324S318000
Reexamination Certificate
active
06694166
ABSTRACT:
BACKGROUND
The invention relates to a magnetic resonance method for forming a fast dynamic image with an automatically generated grid of essentially orthogonally arranged grid lines by a saturation information induced over the object to be imaged, according to the preamble of claim
1
.
Analysis of myocardial motion is essential for the understanding of the heart mechanics and consequently, the estimation of the heart condition for instance after acute myocardial infarction. Myocardial tagging enables to assess accurately tissue deformations. However, conventional tagging sequences such as “SPAMM”, which is described in the article of L. Axel and L. Dougherty in Radiology 1989; 171, pages 841-845, or “CSPAMM”, described in the article of S. E. Fischer et. al. in Magnetic Resonance in Medicine 30: pages 191-200 (1993), allow for registration of the spatial displacement of the myocardium mere as a two dimensional projection. Thus, analysis of the effective three-dimensional (3D) motion trajectories is only possible in a limited way. Former methods of 3D motion tracking combine for example 2D tagged short axis views with 2D tagged long axis views or with a 1D velocity map.
The disadvantages of these known methods are the time-consuming and demanding planning procedure, as well as the difficult matching of the 2D images to a 3D data set.
SUMMARY
It is an object of the present invention to overcome the limitations of the known 2D tagging methods.
This object has been solved by a method as claimed in claim
1
.
These and further advantages of the invention are disclosed in the dependent claims and in the following description in which an exemplified embodiment of the invention is described with respect to the accompanying drawings. Therein
REFERENCES:
patent: 5111820 (1992-05-01), Axel et al.
patent: 5379766 (1995-01-01), McKinnon et al.
patent: 5474067 (1995-12-01), Laub
patent: 6597935 (2003-07-01), Prince et al.
patent: 0 507 392 (1992-10-01), None
S.E. Fischer, G.C. McKinnon, S.E. Maier, P. Boesiger; “Improved Myocardial Tagging Contrast”; MRM; 30:191-2000 (1993).
J. Park, et al.; “Deformable Models with Parameter Functions for Left Ventricle 3-D Wall Motion Analysis and Visualization”; Computers in Cardiology; 1995, Vienna, Austria, Sep. 10, 1995, pp. 241-244.
L. Axel, L. Dougherty; “Heart Wall Motion: Improved Method of Spatial Modulation of Magnitization For MR Imaging”, Radiology, vol. 172, pp. 349-350.
Boesiger Peter
Salome Ryf
Spiegel Marcus Alexander
Weber Oliver Michael
Koninklijke Philips Electronics , N.V.
Lin Jeoyuh
Lundin, Esq. Thomas M.
Mercader Elenimantis
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