The preferred embodiments described herein provide a memory device and methods for use therewith. The needle includes a tubular body having two opposing ends, a first end for connection to a device for driving the needle in rotation and pumping a product, and a second end for penetration of the human or animal body and including a main bevel and at least one secondary bevel. To that end, the method comprises defining a region on the layer in which to produce the recorded pattern. Also in the cell-to-cell comparison, the differential image is first processed by the second threshold value to determine a defect candidate, and the differential image is further processed by the first threshold value.