1. An medical image composition method for composing an assembled image, said assembled image comprising pixels corresponding to positions in an elongate scene, said method comprising the steps of: making a series of consecutive sub-images, wherein each sub-image represents a portion of the elongate scene, pairs of consecutive sub-images overlap along the elongate scene, and each pixel of the assembled image is in the overlapping portion of at least one pair of consecutive sub-images, and merging the sub-images into said assembled image by forming a pixel-value for each pixel in the assembled image by the steps of: selecting a pair of consecutive sub-images in whose overlapping portion is said pixel of the assembled image, selecting pixels in each sub-image of said selected pair of consecutive sub-images which relate to the same position in the elongate scene as said pixel of the assembled image, and assigning a pixel-value to said pixel in said assembled image based upon an interpolation of the pixel-values of each of said selected pixels in each sub-image of said selected pair of consecutive sub-images.