Dynamic Roentgen stereophotogrammetry Dynamic Roentgen stereophotogrammetry Dynamic Roentgen stereophotogrammetry (also referred to as dynamic RSA) is a modern and sophisticated x-ray recording method, used to measure real-time 3D motions of prostheses and bones during motion with high accuracy. It is mostly used in orthopedic research settings and is an advancement of conventional RSA. Conventional static RSA is used to evaluate migration of prosthesis with respect to the bone in three dimensions as a function of time. Migration of the prosthesis are normal 12‐24 months after the surgery. Ongoing migration increase the risk of aseptic loosening with revision surgery as a consequence. The method
1890s in Western fashion 1890s in Western fashion Fashion in the 1890s in European and European-influenced countries is characterized by long elegant lines, tall collars, and the rise of sportswear. It was an era of great dress reforms led by the invention of the drop-frame safety bicycle, which allowed women the opportunity to ride bicycles more comfortably, and therefore, created the need for appropriate clothing. Fashionable women's clothing styles shed some of the extravagances of previous decades (so that skirts were neither crinolined as in the 1850s, nor protrudingly bustled in back as in the late 1860s and mid-1880s, nor tight as in the