The present invention comprises an ultrasonic resonant rod waveguide-radiator with at least three cylindrical sections, one of which is an entrance section having a planar entrance surface and another of which is an exit section having a planar exit surface, and at least two sections having a variable cross-section. A recording medium is constructed of a recording layer on a substrate, the recording layer including a first dye with a maximum absorption wavelength in a thin-film state of 450 nm to 620 nm inclusive as a first dye and being formed so as to include a second dye with an extinction coefficient of at least 0. Normalization processes are administered with respect to candidate target regions that include candidate target tissues based on the directions of the principal axes or the directions of the normal lines. A replacement control module can be included with the running tool when the tool is deployed from above the sea surface. Furthermore, an intermediate plate having plural insertion holes in which the compressor bodies are inserted is provided, and second paper pipes fitted to the end caps at the upper portions of the compressors and third paper pipes may be provided between the upper plate and the intermediate plate. In one embodiment, a process control system disposed within an industrial process environment includes a first process control device, a bridge device, a plurality of field devices disposed within the industrial process environment and a hardwired communication link disposed between the bridge device and each of the plurality of field devices.