Klin Onkol 2013; 26(2): 143-146. DOI: 10.14735/amko2013143.
Summary
Background: Chest movements during the breathing cycle represent a significant problem during radiotherapy of target volumes in the chest. There are several methods how to solve this problem. Case: We have used Active breathing control-moderate inspiration breathhold device in the case of adjuvant treatment of breast cancer. Results: Comparing the DVH (dose-volume histograms) without ABC the heart dose is V25 = 6,95% = 34 cm3, V30 = 5,36%, V45 = 1,71%, D mean 6,2 Gy, however in the case of using ABC device V25 = 1,96% = 8,77 cm3, V30 = 1,26%, V45 = 0%, D mean = 2,58 Gy. The dose delivered to left lung was in the first case V20 = 31,2%, D mean = 15,9 Gy and with ABC device V20 = 26,99% a D mean 13,6 Gy. Doses deliver to right lung, cord and target volume coverage were similar in both situations. Conclusion: According to our experience ABC device represents simple technique how to solve problems with chest movements during radiotherapy.
