Yıl 2019, Cilt , Sayı 17, Sayfalar 388 - 394 2019-12-31

The Effect of Different Colimator Angles in Prostate Radiotherapy Plans with Volumetric Modulated Arc Therapy (VMAT) Technique
The Effect of Different Colimator Angles in Prostate Radiotherapy Plans with Volumetric Modulated Arc Therapy (VMAT) Technique

HAZIM ORHAN KIZILKAYA [1] , Yonca YAHŞİ ÇELEN [2]


The aim of this study was to compare the differences in tumor and critical organ doses by using different collimator angles in the treatment plans of 10 prostate cancer patients who received radiotherapy treatment in the Radiation Oncology Clinic of Şişli Hamidiye Etfal Training and Research Hospital. The plans of 10 prostate cancer patients treated with the Varian Trilogy model linear accelerator were evaluated using the double field Volumetric Modulated Arc Therapy (VMAT) planning technique in the Eclipse (ver.15.3) treatment planning system. In VMAT technique, treatment plans were made when the collimator angles were clockwise (CW) and counter clockwise (CCW) 30°-330°. Critical organs and target organs are re-calculated by changing CW and CCW (15°-345°, 45°-315°, 60°-300°, 75°-285°, 90°-270°) in VMAT calculations without changing the optimization values. Dose distributions were obtained and the effect of collimator angle on dose distribution was examined. The collimator angles, which we obtained the best dose distribution, were determined for VMAT technique and evaluated for statistical significance. Quality control of the statistically significant treatment plans was performed with Electronic Portal Imaging Device (EPID) and the results were compared with 3% dose difference and 3 mm distance difference criteria for each patient in linear accelerator. It was found that the collimator angle which provides optimal dose distribution for the treatment of prostate cancer patients was consistent both statistically and as a result of measurements.

The aim of this study was to compare the differences in tumor and critical organ doses by using different collimator angles in the treatment plans of 10 prostate cancer patients who received radiotherapy treatment in the Radiation Oncology Clinic of Şişli Hamidiye Etfal Training and Research Hospital. The plans of 10 prostate cancer patients treated with the Varian Trilogy model linear accelerator were evaluated using the double field Volumetric Modulated Arc Therapy (VMAT) planning technique in the Eclipse (ver.15.3) treatment planning system. In VMAT technique, treatment plans were made when the collimator angles were clockwise (CW) and counter clockwise (CCW) 30°-330°. Critical organs and target organs are re-calculated by changing CW and CCW (15°-345°, 45°-315°, 60°-300°, 75°-285°, 90°-270°) in VMAT calculations without changing the optimization values. Dose distributions were obtained and the effect of collimator angle on dose distribution was examined. The collimator angles, which we obtained the best dose distribution, were determined for VMAT technique and evaluated for statistical significance. Quality control of the statistically significant treatment plans was performed with Electronic Portal Imaging Device (EPID) and the results were compared with 3% dose difference and 3 mm distance difference criteria for each patient in linear accelerator. It was found that the collimator angle which provides optimal dose distribution for the treatment of prostate cancer patients was consistent both statistically and as a result of measurements.

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Birincil Dil en
Konular Mühendislik
Bölüm Makaleler
Yazarlar

Orcid: 0000-0001-6946-7539
Yazar: HAZIM ORHAN KIZILKAYA (Sorumlu Yazar)
Kurum: Şişli Hamidiye Etfal Training and Research Hospital, Department of Radiation Oncology
Ülke: Turkey


Orcid: 0000-0002-2869-664X
Yazar: Yonca YAHŞİ ÇELEN
Kurum: Afyonkarahisar University of Health Sciences, Department of Radiation Oncology
Ülke: Turkey


Tarihler

Yayımlanma Tarihi : 31 Aralık 2019

APA KIZILKAYA, H , YAHŞİ ÇELEN, Y . (2019). The Effect of Different Colimator Angles in Prostate Radiotherapy Plans with Volumetric Modulated Arc Therapy (VMAT) Technique. Avrupa Bilim ve Teknoloji Dergisi , (17) , 388-394 . DOI: 10.31590/ejosat.612179