Kevin Brown,Ralph Streamer,Paul Boxall,Duncan Bourne,Christopher James Gibson
申请号：
US12739206
公开号：
US08503608B2
申请日:
2007.10.24
申请国别(地区):
US
年份:
2013
代理人:
摘要：
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.
