In 1929, Brigadier General Roger Brooke assumed command of the Station Hospital, a position he held until 1933. Brooke is credited with instituting the first routine chest X-ray in military medicine. In July 1936, the cornerstone was laid for the construction of a replacement Station Hospital. By November 1937, the new 418-bed hospital was operational, having cost $3 million. The new hospital was the first in a series of moves which changed Fort Sam Houston from an Infantry to a medical Post.