Patent ID: 7397936

Claim:
A method of identifying colon polyps in a digital volume, wherein said volume comprises a plurality of values corresponding to a domain of points in a 3D space, said method comprising the steps of: selecting a mother wavelet scaling function that corresponds to a polyp; performing a forward wavelet transformation on said volume to obtain a set of wavelet coefficients, wherein each wavelet coefficient is associated with a length scale; determining, for each length scale, a transformation magnitude, wherein the transformation magnitude comprises a multiplier magnitude; forming, for each length scale, a transformed set of wavelet coefficients associated with said length scale by multiplying, for each length scale, the wavelet coefficients by the multiplier for that length scale to form a multiplied coefficient set for said length scale; performing, for each length scale, an inverse wavelet transform on the transformed wavelet coefficients corresponding to said length scale, to obtain a reconstructed volume, wherein said inverse wavelet transform is performed on said multiplied coefficient set for said length scale; analyzing said reconstructed volume for the existence of polyps; and prior to performing the forward wavelet transform, calculating a first derivative of said volume, and selecting the mother wavelet function to be similar to a first derivative of a polyp.