Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2007-06-12
2007-06-12
Imam, Ali (Department: 3737)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
Reexamination Certificate
active
10499938
ABSTRACT:
A medical ultrasound viewing system for processing a sequence of three-dimensional (3-D) ultrasound images far performing a quantitative estimation of a flow through a body organ comprising means for performing steps of acquiring a sequence of 3D color flow images, of said flow; assessing the flow velocity values in the 3D images, constructing isovelocity surfaces (6) by segmentation of the flow velocity values; computing the volume (Vol) delimited by the isovelocity surfaces; and using the flow velocity value (V) and the volume (Vol) computed from a segmented surface for computing the surface of an orifice (3) of the organ through which the flow propagates. The viewing system further comprises means for performing steps of measuring the peak velocity (VREG) of said flow through said orifice; computing the surface of the orifice (SOR) through which the flow propagates as a function of the flow velocity value (V) at an isovelocity surface upstream the flow propagation with respect to said orifice, the volume (Vol) computed from said segmented isovelocity surface, and the peak velocity of the flow through said orifice. The surface is given by the formula: SOR=Vol. V/VREG. The system can be applied to the assessment of the surface of regurgitation of the mitral jet.
REFERENCES:
“Hemielliptic Proximal Isovelocity Surface Area Method Modified for Clinical Application, More Accurate Quantification of Mitral Regurgitation In Doppler Echocardiography” by Hiroko Fuji et al., in Japanese Circulation Journal, vol. 65, Sep. 2001, pp. 820-826.
“Simplex Meshes: a General Representation for 3D shape Reconstruction” published in the “Proceedings of the International Conference on Computer Vision and Pattern Recognition (CVPR'94), Jun. 20-24, 1994, Seattle, USA”.
Collet-Billon Antoine
Gerard Olivier
Jacob Marie
Imam Ali
Koninklijke Philips Electronics , N.V.
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