sentences:  In 1996, the film underwent a major restoration to create a new 70 mm print and DTS soundtrack.It has appeared repeatedly in polls of the best films by the American Film Institute, including a 2007 ranking as the ninth-greatest American movie of all time.In 1989, "Vertigo" was one of the first 25 films selected by the Library of Congress for preservation in the United States National Film Registry for being "culturally, historically, or aesthetically significant".