Radiation Oncology and Radiotherapy, Part A, Volume 172 in the Methods in Cell Biology series, highlights advances in the field, with this new volume presenting interesting chapters on timely topics, including DNA damage quantification by the COMET assay, Immunofluorescence microscopy-assisted quantification of ATM and ATR activation in irradiated cells, Immunoblotting-based characterization of the DNA damage response, Assessment of lipid peroxidation in irradiated cells, A simple method to assess clonogenic survival of irradiated cancer cells, Quantification of beta-galactosidase activity as a marker of radiation-driven cellular senescence, Cytofluorometric assessment of cell cycle progression in irradiated cells, and more. Other sections cover Assessment of transcription inhibition as a characteristic of immunogenic cell death, Assessment of eIF2a phosphorylation during immunogenic cell death, Quantification of cytosolic DNA species by immunofluorescence and automated image analysis, Flow cytometry-assisted quantification of CALR exposure during immunogenic cell death, Interference of immunogenic anticancer therapy by artificially controlled calreticulin secretion from tumor cells, along with many additional topics of interest.