Disk image at 2 Myr and observing wavelength of 0.45 mm, the amplitude of the perturbation is A = 0.3 and the factor f = 1 for: disk model with parameters of Table 1 (top) and a simulated image using full configuration of ALMA (bottom) with a maximum value of baseline of around 3 km and an observing time of 4 h. The contour plots are at  { 2,4,6,8 }  for the corresponding rms value (see Table 2).