An apparatus and a method for identifying the position of defects (100) in bodies (2), in particular in wooden bodies such as logs or planks, in which a plurality of beams (6', 6", 6"') of electromagnetic radiation lying in lying planes (P1, P2, P3) set at different angles to each other and transversal to a feed direction (A), are directed towards the body and are received by a plurality of sensors (8', 8", 8"') after the beams (6', 6", 6'") have passed through the body (2). The lying planes (P1, P2, P3) are positioned one after another along the feed direction (A), allowing the same portion of the body (2) to be struck by successive beams (6', 6", 6"') as the body (2) is fed forward.
