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.
Although there are three official languages in Belgium (French, Dutch and German), the one spoken most often, by about 60% of the population, is Flemish, which is the local va â¦ riety of Dutch. 2 people found this useful. Tony Ortiz.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.