Abstract: A subject positioning apparatus (10) is disclosed comprising a first part (200) and a second part (100). The first part (200) is configured to contact and conform with a first region of the subject's head and/or neck and to engage with and couple to the second part (100). The first and second part (200, 100) together hold the subject in a fixed position relative to the apparatus (10). The first and second part (200, 100) each further comprising a portion of a seal flange, the seal flange (201, 101) of the first and second part (200, 100) together configured to clamp to further medical equipment so that a region of the subject's head above the seal flange (201, 101) is received in the further medical equipment.

Abstract: A transcranial ultrasound cap (100) is provided. The cap (100) comprises: a bowl (102) having an inner volume arranged to receive a portion of a human head (200), the bowl (102) conforming to the shape of an ellipsoid; and a transducer array (110) in the inner volume, comprising a plurality of ultrasound transducers (112) coupled to the bowl (102).