A drape including a sensing device is disposed over a thermal treatment system having a basin recessed therein to form a drape container or receptacle within the basin for collecting a sterile medium. The output voltage may be converted to a digital value. A basic power supply line is formed inside the ground line. The R, G, B components in pixels at the individual main coordinates are respectively divided by the same components at the corresponding sub-coordinates to provide a color-corrected image. The inventors have discovered that the adhesion promoter can be removed from the cavity area prior to depositing the sacrificial material. Mass body material adjacent the groove walls is deformed and overlies portions of the side edges and protruding elements on the attachment portion.