Method and arrangement for multiresolutive reconstruction...

Details Method and arrangement for multiresolutive reconstruction... Method and arrangement for multiresolutive reconstruction...

2007-05-08

2007-05-08

Glick, Edward J. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

Reexamination Certificate

active

11027482

ABSTRACT:
A medical X-ray device arrangement for producing three-dimensional information of an object in a medical X-ray imaging, the medical X-ray device arrangement comprising an X-ray source for X-radiating the object from at least two different directions and a detector for detecting the X-radiation to form projection data of the object. The medical X-ray device arrangement comprises means for modelling X-ray attenuation coefficient of said object using a multiresolution representation, eliminating part of the coefficients in said multiresolution representation to form reduced multiresolution representation, and utilizing said projection data in a regularized reconstruction method based on minimizing the penaltyin-line-formulae description="In-line Formulae" end="lead"?F(f)=∥Af−m∥2/2+α∥f∥B+βg(f)in-line-formulae description="In-line Formulae" end="tail"?over the coefficients in the said reduced multiresolution representation to produce three-dimensional information of the object.

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Delaney et al., Multiresolution Tomographic Reconstruction Using Wavelets, IEEE Transactions on Image Processing, vol. 4, No. 6, Jun. 1995.

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