Abstract
We implemented a one point set up technique (OPSUT) for a 3-field irradiation of head and neck tumour and breast cancer. In this paper we will present an evaluation of the accuracy and quality on daily pt. set up. Materials and methods PTS. were immobilized using an individually moulded fixation mask when indicated. A field matching plane was constructed by abutting half-beams, made by independent collimation. The number of manipulations inside the treatment room were compared between the OPSUT and the classical techn. (control group). Data on daily variations in precision were acquired from 14 pts. in the control gr. and 20 pts in the OPSUT. Results The number of manipulations decreased from 36 to 23. Those susceptible to human mistake are reduced from 27 to 15. Measurements of table height give a standard deviation of 0.76 cm in the control group and 0.11 cm in the OPSUT. These reductions are significant (P 0.001) and will be present Conclusion The OPSUT gives us more quality.
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