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[New radiotherapeutic technique for application of craniospinal target volume]
1Fôvárosi Onkoradiológiai Központ, Budapest 1145, Hungary.
Aim:
To work out a craniospinal target volume definition and radiotherapy which can be used in clinical practice.
Method:
This technique has been applied in the Municipal Center of Oncoradiology since 2004 for total cerebral and spinal (neuroaxis) radiation. The individual radiation treatment plans were carried out using the CadPlan (Varian) 3D planning system with linear accelerator, in 3D on the basis of CT. The CT slices were prepared at 1 cm distance. The target volume and the organs at risk (OAR) were marked in slices. To delineate the field asymmetrical blending and multileaf collimator (MLC) were applied. Depending on the shape and size of the target, two or more field matching were made with the new technique.
Results:
The dose distribution in the target volume and the OAR were controlled in the coronary, sagittal and horizontal views and with dose volume histograms (DVH).
Conclusions:
The condition for applying this technique is the accurate adjustment of digital simulator picture, field-control picture and DRR (digital reconstructed radiogram).
