• Dosimetry emerges as a formal framework: integral dose, tissue energy absorption, and varying irradiation schemes across X-ray, gamma, and radium therapy, consolidating quantitative radiotherapy approaches [1], [10], [11].

• Radioactive tracers and radiopharmaceuticals establish a versatile methodology to probe biology and medicine, combining tracer chemistry with imaging/therapy applications [4], [13], [20].

• Thyroid physiology and therapy drive a cluster of radioactive iodine studies, linking uptake, metabolism and hormone synthesis to Graves' disease management and goiter models [6], [7], [18], [19].

• Comparative radiobiology across X-rays, neutrons, gamma and other ionizing radiations reveals modality-dependent biological effects and environmental toxicology, shaping cross-cutting radiobiology paradigms [2], [3], [5].

• Health physics and environmental/radiation safety concerns accompany therapeutic radiology, including deposition of radioactive metals in bone and placental transfer risks, underscoring public health considerations [8], [9], [15].