This application discloses a system for recording medical image data for production on a portable digital recording medium such as CDs and DVDs. By increasing the amount of iron available for chelation, the invention also provides methods of treating conditions associated with iron overload. The present invention applies in particular to catalytic cracking of heavy hydrocarbon charges. Adjustable stops are provided to limit the extent of rocking. The hotspot package may comprise a visual overlay which comprises information associated with the reference object matched to the respective candidate object. The surface texturization process substantially comprises: 1) providing an acidic mixed solution; 2) immersing the silicon wafer in the acidic mixed solution; and 3) etching the acidic mixed solution for a predetermined time section.