Abstract: Aspects of the present disclosure are directed to systems, apparatuses, and methods for detecting and correcting for patient respiration within a medical magnetic localization system. In one embodiment of the present disclosure, a system is disclosed for detecting patient respiration in a magnetic field for localization of an intravascular catheter. The system including a magnetic field generator and a magnetic reference sensor. The magnetic field generator generates the magnetic field for localization of the catheter within the patient. The magnetic reference sensor includes sensor coils that have a longitudinal axis, sense the magnetic field aligned with the orientation of the sensor coil, and output an electrical signal indicative of the sensed magnetic field. The magnetic reference sensor is positioned within the magnetic field generated by the magnetic field generator, and the longitudinal axis of each sensor coil is non-parallel relative to an axis of the generated magnetic field.