Patent ID: 7912181

Claim:
A medical diagnostic X-ray apparatus comprising: an X-ray source for providing radiation; a detector for detecting the radiation; a rotatable hollow carrier having a first end connected to the X-ray source and a second end connected to the detector, the rotatable hollow carrier further having a first channel separated from a second channel by a partitioning wall, wherein the partition wall includes a first opening near the first end and a second opening near the second end; and a cooling device containing a gaseous cooling agent for cooling the X-ray source during operation of the X-ray apparatus by circulating the gaseous cooling agent through the first channel in a first direction for passing through the second opening into the second channel for circulation in the second channel in a second direction, and for passing back into the first channel through the first opening, the second direction being opposite the first direction; wherein the gaseous cooling agent is in direct thermal contact with the rotatable hollow carrier.