| 摘要 |
<p>A photon beam dose enhancement is controlled by configuring a topical magnetic field, the magnetic field configuration having a magnetic field component across the beam path and having a magnetic field gradient component along the beam path which cause the dose enhancement, the dose enhancement being changeable during beam use by changing the magnetic field configuration during beam use, wherein the topical magnetic field can be produced by an array of magnet coils.</p> |
