Radiotherapeutic apparatus
US8503608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2007 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Oct 27, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/1036
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus comprising a radiation source which can rotate in an arc around the radiation beam axis, a multi-leaf collimator (MLC), and a controller for the source dose/time rate, the source rotation speed, and the MLC position. The controller calculates the time required for (i) an MLC leaf movement from start to end of an arc-segment at a maximum leaf speed, (ii) rotation of the source from start to end of the arc-segment at a maximum speed, and (iii) delivery of the dose at a maximum dose rate per time, selects the longest of (i), (ii) and (iii), and operates the selected one at its maximum and the others at a reduced rate matching that longest time, the time required for (i) and/or (ii) being the greater of the time to complete the segment at a continuous speed and the time to accelerate the item to that speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.