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.
Belgium has 3 official languages: Dutch, French, and German. Dutch in Belgium is sometimes called Flemish, and is spoken by about 60% of the population as their primary lang â¦ uage. French is spoken as a first language by about 40%, and German by less than 1%.However, there are several unofficial languages spoken by small percentages of the population as well.Walloon used to be the traditional language of southern Belgium in places where French is now spoken today.n the Flemish region, Dutch is the only official language. In the Wallon region, French is the only official language. The Brussels Capital Region is official bi-lingual French/Flemish. There is also a part of people who speak no one of the official languages.