Patent Document ID: 7970195
Application ID: 11908294
Patent Flag: 1

Claim One:
1. A data processing unit for the iterative reconstruction of the attenuation coefficients μ j (j =1 ,. .. N) of a tomographic image from projection measurements m i (i=1,. .. P), wherein m i = R ⁡ ( p i ) ⁢ ⁢ and ( 1 ) p i = [ A ⁢ ⁢ μ _ ] i = ∑ v ⁢ A iv ⁢ μ v ( 2 ) with a given measurement function R and a given weighting matrix A =[A ij ], the data processing unit being adapted to determine the update μ j n+1 (n =1,. . .) of the attenuation coefficient μ j n in the n-th iteration step according to the following equation: μ j n + 1 = μ j n + λ ⁢ ∑ i ∈ I n ⁢ V ⁡ ( A ij ⁢ μ j n p i n ) · W i ⁡ ( A , p i n ) · A ij ⁢ δ i n. ( 3 )