Mri safe tissue expander port

A device configured to detect an implanted tissue expander, the device comprising:

• a housing comprising a display;
• and
• a magnetic sensor configured to detect a direction and a strength of a magnetic field of a magnet in the implanted tissue expander,
• wherein the device controls an output of the display based on signals received from the magnetic sensor.

A system, comprising:

• (i) a tissue expander comprising:
• a selectively inflatable and deflatable shell that is configured to be implanted;
• and an access port for selectively inflating and deflating the shell, the access port comprising a sidewall, a base at a first end, and a membrane at a second end opposite the first end, wherein the sidewall and the base of the access port are constructed of a material that is non-reactive with a magnetic resonance imaging (MRI) machine;
• and
• (ii) a device configured to detect the tissue expander when the tissue expander is implanted, the device comprising:
• a housing comprising a display;
• and a magnetic sensor configured to detect a direction and a strength of a magnetic field of a magnet in the implanted tissue expander, wherein the device controls an output of the display based on signals received from the magnetic sensor.