Koninklijke Philips Corporation N.V.

U.S. Philips Corporation

Michael Lübcke

Rolf Karl Otto Behling

Wolfgang Chrost

Christoph Helmut Bathe

Rolf Behling

Heinz-Jurgen Jacob

Lothar Weil

In a rotatable anode () of an X-ray tube, a heat transfer between the rotating disc of the anode () and the second bearing element () is achieved by providing a contact material () within a gap () between the anode disc () and the second bearing element (). Contact elements () protrude from the second bearing element () into the contact material (), thus allowing a heat transfer from anode disc () to second bearing element () via contact material () and contact element ().

Rotatable anode and X-ray tube comprising a liquid heat link

X-ray tube and method for determination of focal spot properties The invention relates to an x-ray tube () comprising at least one cathode () which emits electrons accelerated towards a rotating anode () such that the focal spot (7) is formed on a surface () of the anode (). A structure (), in particular slits or pits (), is disposed on the surface () of the anode (). The x-ray tube () comprises a detector () for detecting a detection signal which changes, if the structure () on the rotating anode () passes the focal spot. The x-ray tube () further comprises determination means () for determining properties of the focal spot from changes of the detection signal. Thus, properties of the focal spot can be determined from changes of the detection signal during operation of the x-ray tube ().

X-ray tube and method for determination of focal spot properties

An anode of a rotary-anode X-ray tube is connected to a bearing portion which is rotatable about an axis of rotation and which cooperates with the stationary bearing portion in which there is provided a cavity which extends in the direction of the axis of rotation and whose side walls can be cooled by means of a cooling medium. Effective cooling, in combination with a small pressure drop of the cooling medium, is achieved in that there is provided a cooling member which serves to produce an essentially laminar cooling medium flow and which consists of a number of lamellae which extend essentially parallel to the axis and which are in thermal contact with the side walls of the cavity.

Rotary-anode X-ray tube comprising a cooling device

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Hamburg, Germany

Michael Lübcke