In an image data processing device, a notice pixel is selected from among a plurality of pixels constituting an image. A database server performs an operation on a set of data. An apparatus having a movable machining tool for machining of the coating is arranged in connection to a space between a wire and a roll. Each of the M weighted sums includes a respective sum of N products each of which being a product of a respective coefficient and a sensor reading from a respective one of the N sensor nodes. The method includes the acts of generating a dose volume histogram of radiation dose for a pre-existing region of interest, selecting a subset of the dose volume histogram, and defining a new region of interest that corresponds to the selected subset of the dose volume histogram.