Abstract: An X-ray tube frame support assembly includes an annular support structure defining an interior chamber and having an interior surface surrounding and spaced radially outwardly from an X-ray tube frame disposed within the interior chamber, a quantity of cooling fluid contained in the interior chamber about the X-ray tube frame, and contact elements spaced from one another and mounted to the support structure so as to protrude radially inwardly from the interior surface into the interior chamber of the support structure and through the quantity of cooling fluid contained therein toward the X-ray tube frame such that the contact elements contact and hold the X-ray tube frame therebetween. Each contact element includes a body defining a hollow interior cavity and having apertures allowing passage of the cooling fluid into and from the interior cavity of the body for providing a passive damping of any vibrational movement of the X-ray tube frame.