US Patent 11911630 Small profile light therapy probe

In some implementations, a PDT system may include a probe assembly having an elongated cylinder having a probe inner diameter and a probe outer diameter optical surface and a probe tip positioned on a distal end, a therapy window positioned proximal the probe tip, a door positioned inside of the elongated cylinder and configured to move between an open position to expose the therapy window and a closed position to seal the therapy window, a balloon positioned within the inner probe diameter, a cylindrical light diffuser position inside of the balloon, and a detector fiber positioned proximate the cylindrical light diffuser.