Image analysis – Applications – Biomedical applications
Reexamination Certificate
2011-06-28
2011-06-28
Chen, Wenpeng (Department: 2624)
Image analysis
Applications
Biomedical applications
C382S263000
Reexamination Certificate
active
07970191
ABSTRACT:
A method for downsampling fluoroscopic images and enhancing guidewire visibility during coronary angioplasty includes providing a first digitized image, filtering the image with one or more steerable filters of different angular orientations, assigning a weight W and orientation O for each pixel based on the filter response for each pixel, wherein each pixel weight is assigned to a function of a maximum filter response magnitude and the pixel orientation is calculated from the angle producing the maximum filter response if the magnitude is greater than zero, wherein guidewire pixels have a higher weight than non-guidewire pixels, and downsampling the orientation and weights to calculate a second image of half the resolution of the first image, wherein the downsampling accounts for the orientation and higher weight assigned to the guidewire pixels.
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Athitsos Vassilis
Barbu Adrian
Comaniciu Dorin
Durlak Peter
Georgescu Bogdan
Chen Wenpeng
Siemens Medical Solutions USA , Inc.
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