xDSL - Computer Definition. Referring to any of a group of broadband digital access technologies operating over embedded unshielded twisted pair (UTP) telco local loops. xDSL technologies employ sophisticated compression algorithms and multiplexing techniques to derive performance that often exceeds 1 Mbps over a voice grade local loop. Most DSL technologies support simultaneous voice and high speed Internet access, and a number support video, as well.
Osseous structures means bony structures and in thorax it includes ribs,vertebra, clavicle. It is normal in your case. There is no abnormality in bones. There is some problem in perfusion study and in your case it is due to ischemic(decreased blood supply to part of heart)insult.
Cancellous or Spongey Bone. Cancellous or spongey bone is found forming the core of most flat and irregular bones. It is also very prevalent in the epiphyses(ends) of long bones. The construction of this osseous tissue type is quite different than that of compact bone. One key difference is the absence of osteons! Spongey bone as the name implies is more open and in cross-section offers a compartmentalized appearance not unlike that of a sponge.