In a method and apparatus for continuously, directly monitoring the RF-tightness of a shielded cubicle of an MR system, a radio-frequency signal is transmitted to the cubicle from the outside via an antenna and the signal part that passes to the interior is identified with a receiver in the inside of the cubicle. The MOSFET switch switches an AC analogue input signal on a main input terminal to a main output terminal and the gate of the MOSFET switch is AC coupled by a capacitor to the drain thereof. An attachment component secures the rear wall to an upright structural surface. The optimization module receives a second performance indicator set for a second instance of the time period set. A bearing is affixed about the end of each of the arms so that the arms may move inwardly and outwardly along the underside of the shell as the shell is flexed. The water is removed in a feed gas separator and the condensed liquids are fed into an integrated refluxed stripper that operates as a drierdemethanizer for the condensed liquids, and the uncondensed portion containing light components is further dried and cooled prior to turboexpansion and demethanization.