odmj OncoDaily Medical Journal ODMJ 3067-6444 OncoDaily Medical Journal US 6863 10.69690/ODMJ-018-3101-6863 Abstracts Improving Setup Precision in DIBH Radiotherapy for Left-Sided Breast Cancer: Tattoo-less vs. Tattoo-Based Surface-Guided and Respiratory Gating Techniques Cyriac Swapna Lilly Department of Radiation Oncology, Caritas Hospital and Institute of Health Sciences, Kottayam, Kerala, India / Advanced Care Oncology Center, Al Furjan, Dubai drswapnalillycyriac@gmail.com Thomas Biju P. Department of Radiation Oncology, Caritas Hospital and Institute of Health Sciences, Kottayam, Kerala, India Joseph Naiby Department of Radiation Oncology, Caritas Hospital and Institute of Health Sciences, Kottayam, Kerala, India Nair Meera S. Department of Radiation Oncology, Caritas Hospital and Institute of Health Sciences, Kottayam, Kerala, India Joseph Lincy Department of Radiation Oncology, Caritas Hospital and Institute of Health Sciences, Kottayam, Kerala, India Varghese Reji Department of Radiation Oncology, Caritas Hospital and Institute of Health Sciences, Kottayam, Kerala, India Joseph Jenny Department of Radiation Oncology, Caritas Hospital and Institute of Health Sciences, Kottayam, Kerala, India Aaron Judith Department of Radiation Oncology, Caritas Hospital and Institute of Health Sciences, Kottayam, Kerala, India 31 01 2026 ODMJ-018-3101-6863 Copyright (c) 2026 OncoDaily Medical Journal 2026 OncoDaily Medical Journal AMSTRO 2026 Breast Cancer Deep Inspiration Breath-Hold DIBH Surface-Guided Radiotherapy Tattoo-less Setup production-ready-file-url