A phased array ultrasonic inspection system configured for weld inspection includes a data analysis process with automated and optimized gating to take into account the actual distance between a phased array probe and a weld line. The system embodies a weld tracking module and a dynamic gating module. The tracking module produces dynamically corrected overlays of the weld line based on the echo signals, the dynamically corrected overlays having a series of offsets from the corresponding initial overlays. The dynamic gating module purposefully positions a plurality of data analysis gates to filter out noise signals caused by sources unrelated to the weld, and to provide dynamic target gating adjusted by at least part of the offset.