[Use of three-dimensional conformal radiation system in radiotherapy of solid tumours in children].

Three - dimensional treatment planning system using CT is the most modern tool in the radiotherapy of children. It is most useful in treatment of solid tumours when the neoplasm is very close to the vital organs. In our work we have presented three cases of small children in whom owing to conformal radiotherapy it was possible to give the treatment dose to the planning target volume (PTV) and spare adjacent critical organs.