Method and apparatus for extending regions in two-dimensional image space or volumes in three-dimensional image space that are generated by a test area-based region growing mechanism. In the formula, R1 represents CnH2n+1, and n represents an integer of 13 to 20; and R2 represents CnH2n+1, and n represents an integer of 1 to 20. Preferably, the piezoelectric material is implemented as a ferroelectric material. An ultrasound system can be provided in the device either alone or in combination with fiber optic imaging to provide a range of forward imaging and therapeutic capabilities of the device for direct access to a target site from the skin via the removable introducer needle.