Which combining form is not generally associated with radiology?

The combining form "derm/o," which relates to skin, is not generally associated with radiology. Radiology primarily focuses on imaging techniques and diagnostic processes related to internal body structures, often using terms like "radi/o" for radiation or "son/o" for sound in ultrasound. Other forms, such as "cardi/o" for the heart or "nephr/o" for kidneys, are more relevant in the context of radiologic examinations.