Irradiation apparatus using radioactive sources
First Claim
1. An irradiation apparatus using at least one radioactive source and comprising a fixed support with which there is associated an arm movble about an axis X--X, an irradiation head comprising an enclosure made from a material impermeable to the radiation of the source and, in said enclosure, a first biological protection screen surrounding at least partially a second biological protection screen, said second screen having a housing for receiving the radioactive source, a primary collimator and a secondary collimation device comprising a conical pot made from a material impermeable to the irradiation beam and, integral with said conical pot with axis Y--Y, two pairs of frames, each of the frames, movable about a shaft fixed to said conical pot, being associated with a mechanical moving system, each frame having collimating plates disposed substantially perpendicularly to the frame on which they are fixed, each frame of the secondary collimation device is connected to the conical pot by means of a compass system formed from two legs hinged together about a shaft dd, one of the legs being rotatable about a shaft bb fixed to the conical pot and the other leg being rotatable about a shaft cc fixed to the frame considered, said shafts being parallel to the axis of rotation of the frame on which is fixed the compass system.
1 Assignment
0 Petitions
Accused Products
Abstract
An irradiation apparatus for obtaining an irradiation beam having precise and easily adjustable dimensions. This apparatus comprises more particularly a secondary collimation device having an axis Y--Y, removably fixed to the mobile arm of the irradiation apparatus and comprising a conical pot, two pairs of frames which support collimating plates and are movable about shafts fixed to said conical pot, each of said frames being connected to said conical pot by means of a compass system formed from legs hinged together about shafts. With said frames are associated mobile antipenumbra plates whose position is checked by means of a feeler system.
10 Citations
6 Claims
- 1. An irradiation apparatus using at least one radioactive source and comprising a fixed support with which there is associated an arm movble about an axis X--X, an irradiation head comprising an enclosure made from a material impermeable to the radiation of the source and, in said enclosure, a first biological protection screen surrounding at least partially a second biological protection screen, said second screen having a housing for receiving the radioactive source, a primary collimator and a secondary collimation device comprising a conical pot made from a material impermeable to the irradiation beam and, integral with said conical pot with axis Y--Y, two pairs of frames, each of the frames, movable about a shaft fixed to said conical pot, being associated with a mechanical moving system, each frame having collimating plates disposed substantially perpendicularly to the frame on which they are fixed, each frame of the secondary collimation device is connected to the conical pot by means of a compass system formed from two legs hinged together about a shaft dd, one of the legs being rotatable about a shaft bb fixed to the conical pot and the other leg being rotatable about a shaft cc fixed to the frame considered, said shafts being parallel to the axis of rotation of the frame on which is fixed the compass system.
Specification