Özet:

3BKRT and VMAT techniques used in radiotherapy of ozofagus cancer are to see their effects on the protection of hazardous organs while surrounding the target volume and to obtain their own data; comparing these retrospective dozimetric results we obtain with each other. For this study; 10 curative radiotherapy-treated torace-based ozofagus cancer diagnosed patients were selected. The fraction dosage will be 1.8 Gy and the total dosage will be 54 Gy. The two techniques were compared with the critical organ dose (OAR), CI and HI. As a result of the statistical comparison, there was no significant difference between 3BKRT and VMAT in the analysis of the values of PTV54, except HI (p=0,010). For OAR doses, the V10 value of the lungs is superior in the 3BKRT technique (p=0,017). The value of the heart V40 was found low in the VMAT technique (p=0,002). Furthermore, when it comes to the Spinal Cord Dmax value, the VMAT technique has lower values than 3BKRT (p=0,001). The result of our study is that although the dosage homogenity and the risk of the organs are available in both techniques, considering the comorbidities that affect these older patients, it has been shown that the use of the VMAT technique may be preferred.

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