Research
Mar 19, 2007
Tumour motion: no easy answers
It's one of the thorniest problems in medical-physics research just now: how to deal with the breathing-induced movement of lung tumours during radiation therapy. One widely employed countermeasure is respiratory gating, where radiation is only delivered at a specific set point in the breathing cycle, such that the tumour should always be in more or less the same place. There is some debate about how well this approach actually works, however, and it has been suggested that widespread use of gating could even do more harm than good.
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