The present invention provides a system and method for obtaining in vivo images. The fuel processor comprises a reformer and burner. A stack of planar layers of material is formed adjacent and around the nanopillar. In addition, the dyes are preferably soluble in aqueous or other medium in which the component is contained. Oils containing fatty acid chain lengths of C8, C10, C12 or C14 are also disclosed and are useful as feedstocks in the methods described herein. Also included are skew indicia, which may include a plurality of images spaced a predetermined angle from each other, and a processor, coupled to the array of optical imagers and operable to process information from the imagers.