“…This method employs the MAP estimation of organ label l ∈ {1, .., L} over 4D spatio-intensity feature vector v = (x, y, z, I(x, y, z)):l = argmax l p(v|l)p(l). The prior p(l) is modeled by a standard probabilistic atlas [2,9]. The atlas A l (x) ∈ [0, 1], x = (x, y, z), is built by registering K training images of normal anatomy to a fixed reference image I R with a size-preserving affine registration then computing a probability map for each of L modeled organs by counting manually segmented organs.…”