(FILES) In this file picture taken on July 3, 2012 US cyclist Lance Armstrong (C) undergoes the traditional medical check-up with Tour de France’s doctor Gerard Porte before the start of the 90th Tour de France at the Parc des expositions in Paris. Lance Armstrong could be willing to take a lie detector test as he tries to prove he is not guilty of doping allegations, the American’s lawyer claimed on October 14, 2012. Armstrong has been stripped of his seven Tour de France titles by US Anti-Doping Agency (USADA) and banned from the sport for life after the organisation claimed he orchestrated the most sophisticated doping programme ever seen. AFP PHOTO FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP/GettyImages)