Patient interface system

A patient interface system for scanning a volume of tissue protruding from a patient, the system comprising:

• a base including a planar portion configured to support the patient in a prone configuration, and a frustoconical portion extending beyond a plane defined by the planar portion and defining a base aperture configured to receive the volume of tissue;
• and
• a support assembly configured to couple to the base, including a frame base defining a superior surface and an inferior surface configured to abut to the frustoconical portion of the base, a bezel configured to couple to the superior surface of the frame base and provide a gap between the superior surface of the frame base and the bezel, and a membrane retained in tension within the gap at a peripheral portion of the membrane,
• wherein the membrane defines a membrane aperture configured to align with the base aperture, and
• wherein the membrane is configured to deflect into the frustoconical portion of the base in response to the patient's weight.