Dr. Ranganath is a renowned radiation oncologist with immense expertise in managing CNS tumours, breast cancers, head and neck cancers, gastrointestinal and gynaecological cancers. He is an expert in administering all major radiotherapy techniques. He has a special interest in using hypofractionation for treating cancers, adaptive radiotherapy, and re-irradiation. Dr. Ranganath is a lifetime member of various national and international organisations like ESMO and AROI. He is a regular speaker in many regional cancer awareness programmes and profoundly encourages groups with cancer prevention measures.