A control unit performs helical scanning an subject while moving a top along a direction substantially parallel to a body axis. For example, various metal-oxide-semiconductor field-effect transistors can include a dielectric layer andor a passivation layer prepared from such polysulfone-based materials and exhibit good device performance. An optimized diluent combination is determined, comprising an aromatic or cycloaliphatic solvent such as toluene, benzene, naphthalene, xylene, anthracene, or cyclohexane together with a C3 to C12 paraffinic solvent. Also, it is possible to easily mount the detecting means that detects the operation of the battery cells, and it is possible to effectively prevent the occurrence of short circuits during the assembly or the operation of the battery module. Upon entering the vascular site, the implant expands in situ substantially to fill the vascular site.