Inclusion Criteria:  Patient over 18 years-old Patient requiring intervention with a predicted risk of exceeding the radiological threshold (Air Kerma> 3Gy): complex coronary dilation, coronary recanalization Patient benefiting from a social protection insurance Patient having been informed and not objecting to this research  Exclusion Criteria:  Patient refusal to participate in the study Patient with known radiosensitivity factors (eg: Lupus) Patient having had radiotherapy treatment of the thoracic region. Patient whose sum of radiation doses to the skin> 0.5 Gy in the thoracic region in the 3 months preceding inclusion. Patient participating in another clinical study Protected patient: adult under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision Pregnant or breastfeeding woman Patient hospitalized without consent.