Dosimetric Study of Voluntary Deep Inspiratory Breath-Hold (V-DIBH) Vs Free Breathing (FB) Technique on Organ Doses for Left-Sided Breast Cancer

Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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JR_IJMP-19-6_002

تاریخ نمایه سازی: 11 آبان 1401

Abstract:

Introduction: Long term cardiac morbidity is a concern with left sided breast/chest wall irradiation. In this present study, we have evaluated the Impact of Voluntary deep inspiratory breath hold (V-DIBH) Vs Free Breathing (FB) technique on heart and lung doses for left-sided breast cancer with audio visual guidance. Material and Methods: A total of ۳۱ patients diagnosed with left breast cancer were found to be suitable for V-DIBH. Patients were trained for breath hold technique for ۳ to      ۴ days on CT simulator. Seven  patients being non-compliant to  V-DIBH  therefore ۲۴ patients were simulated for breath hold. We made tangential IMRT plans for all the patients on both V-DIBH and free breathing scans for dosimetric comparison. D۹۵% target and organ at risk (OARs) like Dmean of heart, LAD, lung and opposite breast were compared for both plans.  Results: A significant reduction of mean cardiac dose from ۵.۷ ± ۱.۵۸ Gy to ۳.۴۵ ± ۰.۶۸ Gy (p<.۰۵) and cardiac V۲۵Gy from ۷.۲۸ ±۳.۹۷ % to ۱.۶۴ ± ۱.۳۵% (p<.۰۵) in V-DIBH cases as compared to FB. Mean dose to the LAD was reduced by ۳.۹ Gy in DIBH cases (p<.۰۵). Differences between FB and V-DIBH mean lung dose was ۲.۴۷ Gy (p=.۱۰۶, ns) and ipsilateral lung V۲۰Gy was ۲.۵۷% (p=.۰۷۸, ns). Conclusion: This study demonstrates dosimetric benefits of V-DIBH over FB in reducing dose to heart, LAD and ipsilateral lung without compromising the target volume coverage. We should opt for V-DIBH over FB for left sided breast cancer cases

Keywords:

V , DIBH Free Breathing Heart Lung Breast Cancer

Authors

Deepti Sharma

Dept of Radiation Oncology, ILBS, New Delhi

Nidhi Marjara

Dept of Radiation Oncology Max Superspeciality Hospital, Shalimar Bagh ,Delhi

Vineeta Goel

Department of Radiation Oncology, Fortis Superspeciality Hospital, Shalimar Bagh Delhi

Nithya Loganathan

Department of Radiation Oncology Max Superspeciality Hospital, Shalimar Bagh ,Delhi

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