Comparison of cardiac and lung doses between free breathing and deep inspiration breath hold technique for breast irradiation- A dosimetric study

2^nd World Congress on Breast Cancer

September 19-21, 2016 Phoenix, USA

Mohammad Faruk Hossain, Karthick Raj Mani and Anamul Haque

United Hospital-Dhaka, Bangladesh

Scientific Tracks Abstracts: J Cancer Sci Ther

Abstract :

Purpose: To investigate the cardio-pulmonary doses between Deep Inspiration Breath Hold (DIBH) and Free Breathing (FB) technique in left sided breast irradiation. Materials & Methods: DIBH CT and FB CT were acquired for 10 left sided breast patients who underwent whole breast irradiation with or without nodal irradiation. Three fields single isocenter technique were used for patients with node positive patients along with two tangential conformal fields whereas only two tangential fields were used in node negative patients. All the critical structures like lungs, heart, esophagus, thyroid, etc were delineated in both DIBH & FB scan. Both DIBH and FB scan were fused with the dicom origin as they were acquired with the same dicom coordinates. The critical structures of the FB scan were transferred to the DIBH dataset with reference to the dicom origin. Plan were created in the DIBH scan for a dose range between 45-50Gy in 25 fractions. Critical structures doses were recorded from the Dose Volume Histogram for both the DIBH and FB data set for evaluation. Results: V25 (relative volume receiving 25Gy and more) for heart were reduced from 19.14% (FB) to 3.68% (DIBH) using the breath hold technique. Ipsilateral lung V20 volume was also reduced between 25% and 15% with DIBH compared to FB technique. Conclusion: DIBH shows a substantial reduction of cardiac and pulmonary doses compared with FB technique. Using the simple DIBH technique we can effectively reduce the cardiac morbidity and lung pneumonitis.

Biography :

Mohammad Faruk Hossain is working as a Medical Physicist in Radiation Oncology Department at United Hospital Limited since November, 2010 to till now. He worked as an honorary Medical Physicist at National Institute of Cancer Research and Hospital (NICRH) from June, 2006 to April, 2008 and also at Radiotherapy Dept. Dhaka Medical College & Hospital from June, 2008 to October, 2010.

Email: farukdl@yahoo.com