Breast Cancer and Chemobrain : Effects of Photobiomodulation on the Improvement of Perceived Cognitive Impairment

Inclusion Criteria: * Women aged 18 and over * Having completed chemotherapy (intravenous) for breast cancer (any stage) less than 12 months prior to inclusion * Having a perceived cognitive complaint that appeared during or after (\< 3 months) chemotherapy treatments (no restriction on the care protocol used) and confirmed by a FACT-Cog score compatible with a subjective cognitive disorder (score \< 117 for patients aged 18 to 49; score \< 113 for patients aged 50 to 69; score \<105 for patients aged 70 and over) * Patient eligible for photobiomodulation sessions * Patient with sufficient command of the French language to complete the study questionnaries * Patient having given written consent to participate in the trial * Socially insured patient * Patient willing to comply with all study procedures and duration Exclusion Criteria: * Known cognitive disorders prior to chemotherapy treatment * Patients with psychiatric or psychobehavioral disorders incompatible with photobiomodulation sessions * Patients who, in the 12 months prior to inclusion or at the time of inclusion, have already received photobiomodulation treatment involving "whole body" therapy (photobiomodulation in a phototherapy booth). * Patient having previously received photobiomodulation with cortical stimulation (panel or helmet) with no time limit. * Patient taking or having received capecitabine * Patients taking part in a protocol involving a drug likely to affect cognitive performance (on the investigator's advice). * Patients suffering from claustrophobia * Patient unable to read and/or unable to complete a questionnaire, in the opinion of the investigator