Deprojected azimuthally averaged radial proflies of brightness temperatures of the ¹²CO J = 2−1 (green), ¹³CO J=2−1 (orange), and ¹³CO J = 6−5 (blue) transition for LkCal5 (left) and HD 169142 (right). The solid lines show the brightness temperature calculated using the Planck function, and the faded dotted colors show the Rayleigh-Jeans approximation. The vertical black lines indicate the rings seen in the Band 9 continuum, and the light blue region starting from 0 AU indicates the gas cavity. The MRS of the HD 169142 J = 6−5 data corresponds to a radius of 35 AU.