Changes of the brightness temperature as a funcion of jet width for four sources – J2322+5037, J1033+6051, 3C 345, and 0716+714 from this survey. Blue squares denote the measured T_b from this survey. The red circles connected with a dotted line represent theoretically expected T_b under the assumption of adiabatic jet expansion. The initial brightness temperature in each jet is assumed to be the same as that measured in the VLBI core.