Surgery – Truss – Pad
Patent
1995-06-30
1997-09-02
Jaworski, Francis
Surgery
Truss
Pad
382128, A61B 800, G06K 900
Patent
active
056621132
ABSTRACT:
A method for enhancing an ultrasound image. The image is assumed to be in the form of an ordered array of pixels. Each pixel corresponding to the intensity of the echo generated by a corresponding voxel in an ultrasound energy field. Axial and lateral directions relative to the ultrasound beam used to generate the sound field are defined within the ordered array. The method of the present invention includes the steps of dividing the image into a plurality of processing blocks, picking blocks that satisfy certain statistical constraints for edge enhancement, enhancing the pixels in the selected blocks, and then displaying the pixels in each block, whether enhanced or not, that are above a display threshold for the block in question. The statistical constraints are determined by second order statistics with reference to the axial and later directions. In one embodiment of the present invention, sum and difference histograms are used to approximate the second order statistics, thereby reducing the computational load.
REFERENCES:
patent: 5148809 (1992-09-01), Biegeleisen-Knight et al.
patent: 5339815 (1994-08-01), Liu et al.
patent: 5457754 (1995-10-01), Han et al.
Crook, I et al "A Novel Algorithm for Edge Detection and Edge Enhancement of Medical Images", Med. Phys. 20(4) Jul./Aug. 1993 pp. 993-998.
Hwang, Humor et al "Multilevel NL Filters for Edge Detection & Noise Suppression", IEEE Sig Proc. Trans. V24 #2 Feb. 1994 pp. 249-258.
Jaworski Francis
Siemens Medical Systems, Inc
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