Evaluation of the Radiological Dose Delivered to Risky Interventional Cardiology Patients (Optidose)

The purpose of this study is therefore to study the actual doses of X-rays delivered to the patient's skin during recanalization of a coronary artery in a context of Chronic Total Occlusion

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.