Method and apparatus for modulating the radiation dose from x-ray tube
US6507639B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2001 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/30
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a method for modulating a radiation dose from an x-ray tube, and in an x-ray tube-containing apparatus, the x-ray tube has at least one variable operating parameter which, when varied, modulates the radiation dose, with a modulation speed, for x-rays produced by the x-ray tube, and the x-ray tube is operated while varying this parameter through a parameter range to generate modulation speed data, representing modulation speeds of the x-ray tube respectively for different values of the operating parameter. When an examination subject is to be irradiated with an x-ray dose from the x-ray tube, an exposure effect associated with the exposure of the subject to the radiation dose is identified, this exposure effect being dependent on modulation of the radiation dose. When exposing the subject to the radiation dose, the operating parameter is varied in advance of a time at which the exposure effect is to be achieved, dependent on the modulation speed data, so that the radiation dose is modulated to produce the desired exposure effect at the desired time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.