Interventional radiology performs examinations and treatments of the blood vessels arteriography, venography, angioplasty and embolization. All procedures in radiology that are performed with the help of ionizing radiation deliver a certain dose of that radiation to the environment, the patient and the staff participating in the examination. In interventional radiology and cardiology, there are special doses of radiation that are measured. Primarily these are KAP [Kerma Area Product] and PSD [Peak Skin Dose]. KAP is the integral of the air kerma over the recorded area which is exactly vertical under the x-ray beam and is expressed in Gycm2, often also determined as DAP [Dose Area Product]. Wearing dosimeters, and their regular control, is an established way of checking the exposure of staff to ionizing radiation during interventional procedures. Interventional staff are exposed to radiation differently. The highest doses are received by interventional physicians who can receive different doses of radiation from the same interventions. The patient dose depends on the skill of the physician, but is also affected by the patient's own habitus, so patients with a higher BMI receive higher doses of radiation. Thus, for coronary interventions, the patient can receive lower doses, as those for left heart catheterization, but also high doses as those from complex percutaneous coronary intervention. All recorded doses are within the prescribed limits, however, there is room for progress and standardization of interventional procedures.