This is a medical catheter made up of a body having on its distal end portion an expandable balloon and, proximal of the balloon, a delivery lumen ending in a port through which therapeutic or diagnostic agents may be delivered. The first image data includes one or both of: i) a marked-up image of a geographic area including the dig area, wherein the marked-up image includes at least one dig area indicator to provide an indication of the dig area; and ii) geographic information relating to the at least one dig area indicator. The first locking member includes an engaging slot. The core blocks and the coil assembly of the outer stator are assembled in the linear compressor while the core blocks and the coil assembly of the outer stator are integrally attached to each other.