A method and apparatus for scanning andor printing barcodes is described. The imager cell is made from a bulk silicon substrate. The tubular catheter shaft comprises an unfilled or low-loaded inner liner andor outer shell. The web-client also provides an alternative method to capture and transmit voice signals to the server for analysis and from which a speech therapy is coordinated and delivered. The first and second concaveconvex structures are formed such that the first concaveconvex structure has a depth-to-width ratio greater than a depth-to-width ratio of the second concaveconvex structure, and that a light transmittance is higher in the first portion than in the second portion.