There is no specific intervention assigned to the study participants, i.e. the patients will receive one of the four environments as part of routine medical care, and a researcher studies the effect of this environment on anxiety's level. Every week, one environment will be set up in the MRI or scanner waiting room and the study will be proposed to all eligible patients present in this room. Fifty patients are expected each week so that 100 patients per environment and equally distributed between the MRI and scanner waiting rooms are expected.