Miniature X-ray tube for a catheter
AssigneeSiemens Aktiengesellschaft
InventorsMathias Hörnig, Michael Maschke
Life of this patent
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Abstract
A miniature X-ray tube for intravascular or intracorporeal radiation treatment in living beings is proposed. The X-ray tube comprises a cylindrical housing section with a longitudinal axis. The miniature X-ray tube also comprises a cylindrical or cylindrical-tube-shaped first field emission cathode arranged concentrically about the longitudinal axis in the housing with a plurality of carbon nanotubes which emit electrons radially outward. The miniature X-ray tube also comprises a second field emission cathode in the housing with a plurality of carbon nanotubes which emit electrons in the direction of longitudinal axis. The miniature X-ray tube only emits little heat and is robust against mechanical stresses.
Claims18
A miniature X-ray tube for an intravascular or an intracorporeal radiation treatment in a living being, comprising:
- a cylindrical housing with a longitudinal axis;
- a field emission cathode arranged in the housing;
- and
- a plurality of carbon nanotubes arranged on the field emission cathode that emit electrons,
- wherein the field emission cathode comprises a plurality of cylinder rings,
- wherein the carbon nanotubes are arranged on the cylinder rings, and
- wherein the cylinder rings are stacked in line and to offset the carbon nanotubes arranged on the cylinder rings.
A catheter for an intravascular or an intracorporeal radiation treatment in a living being, comprising:
- a shaft;
- and
- a miniature X-ray tube arranged in a distal end of the shaft, wherein the miniature X-ray tube comprises:
- a cylindrical housing with a longitudinal axis;
- a field emission cathode arranged in the housing;
- and
- a plurality of carbon nanotubes arranged on the field emission cathode that emit electrons,
- wherein the field emission cathode comprises a plurality of cylinder rings,
- wherein the carbon nanotubes are arranged on the cylinder rings, and
- wherein the cylinder rings are stacked in line and to offset the carbon nanotubes arranged on the cylinder rings.
Dependencies are inferred from the claim text.