Meanings of irradiate small in English

Then she appears to suggest that iodine-131 can "continuously irradiate small volumes of cells … over many years".

Pelvic computed tomography was performed to calculate the volume of irradiated small bowel.

We retrospectively studied the correlation between the volume of irradiated small bowel and the development of acute diarrhea in these patients.

Conclusions: The volume of irradiated small bowel was an independent risk factor for all patients who developed diarrhea, especially those undergoing conventional RT.