A planar coil arrangement (400) for a magnetic induction impedance measurement apparatus comprises an excitation coil (102) configured for generating a magnetic excitation field in an object, and a detection coil (404) configured for detecting a magnetic response field generated in response to the magnetic excitation field inducing a current in the object. In order to minimize an effect of the magnetic excitation field in the detection coil (404), the detection coil (404) is radially symmetrical shaped with respect to the excitation coil (102) and is arranged relative to the excitation coil (102) such that the magnetic excitation field is minimized in the detection coil (404).