The ultrasonographic evaluation of the brain is widely disseminated, focusing on the transcranial Doppler technique, which allows the evaluation of the flows of the different arteries of the circle of Willis in neurocritical patients. In this context, for a long time the brightness mode (B‐mode) has not been taken into account for the study of the pathology of the central nervous system. However, it has been shown that it can also provide valuable information in neurocritical patients by being able to identify hemorrhagic, tumoral, ischemic, traumatic and inflammatory lesions to mention some of its applications. Due to this, the B‐mode should also be considered as an indispensable tool in the management of neurocritical patients.