The invention relates to a support structure 1 for mammography, comprising a stand 2 and an arm structure 3 attached thereto. The support structure 1 further comprises a scanner head cover 6 attached to the arm structure 3. The scanner head cover 6 comprises a vertical side portion 6a, and is designed so that a cavity 12 is formed between the vertical surface portion 6a and a vertical part 3b of the arm structure 3, whereby the cavity 12 provides space for an arm of a patient during imaging. A more comfortable posture is provided for a patient.