Patent ID: 9697980
Date: 2017-07-04
CPC Classifications: A61B,G21K,H01J

Claim:
1. An X-ray generating apparatus comprising: an X-ray generating tube including: a collimator having a plurality of movable blades which form an opening for defining an angle for extracting the X-ray at the opposite side of the electron emitting source side of the target; and an adjusting device connected to the plurality of movable blades, and configured to vary an opening diameter of the opening, wherein the target layer is distant from the connection portion via a separate portion so as to reduce an off-focal radiation due to re-entering electrons to the target layer from the tubular backward shielding member or the target layer, and wherein the collimator is configured to be controlled by the adjusting device so as to reduce an off-focal radiation due to the tubular backward shielding member and the separate portion.