Introduction. RSA is a powerful research technique that is currently being studied at Hospital for Special Surgery (HSS) for joint replacement patients. RSA stands for r adio s tereometric a nalysis, which describes a special way of taking two x-rays from different directions at the same time, creating a âstereoâ image.SA has been used for over 30 years in Europe and for 5 years at Hospital for Special Surgery. The only potential risks come from implantation of the marker beads. 1  The insertion of beads takes an additional 5 to 10 minutes of surgery.
They're right not to â in the mid 19th century Brussels was a mainly Dutch-speaking city. There's been a major swing towards French since, fueled not just by migration, but also by families switching language. Even so, it was only really by the 1950s that Dutch had definitively lost its role as the city's vernacular.
In Belgium, federal politicians generally manage both Dutch and French. Most don't know how to speak German fluently, although German is our third official language. It is spoken only by a small minority of approximately 75,000 individuals (less than 1% of the belgian population). It is usually harder for a native French-speaking politician to speak Dutch than the other way around.