An apparatus and method of MR imaging is disclosed. A table comprised of a plurality of entries with IP addresses associated therewith is built, wherein the entries are organized hierarchically according to an LC-Trie compression algorithm operating on the IP addresses. The system determines whether the communication packet belongs to a pre-existing communication session, and whether session state information associated with the session is available locally. The loudspeaker is arranged outwards. In humans, the detection and sorting of at least 24 classes of microparticles would be sufficient for a single tube method for the simultaneous detection of aneuploidy in all chromosomes, wherein each distinct microparticle class comprises a polynucleotide sequence complementary to, and specific for, a polynucleotide sequence that is unique to a particular human chromosome.