f Algebraic Reconstruction for 3D Seismic Quality Control

Derived from medical applications, algebraic reconstruction techniques (ART) were first implemented by geophysicists for crosswell tomography (Bois et al., 1972; Bishop et aI, 1985; Paulson- et aI, 1985; Ivansson, 1985). 2D refraction cases were recently studied (Krajewski et aI, 1989; Ruhl and Luschen, 1989), using a particular ART variant known as Simultaneous Iterative Reconstruction Technique (or SIRT), whereby each model bin slowness is modified when all raypaths pertaining to that bin have been taken into account.