1. A method for positioning an electromagnetic tracking sensor, said method including: determining a region of interest in a patient anatomy, wherein said region of interest represents an area of reduced electromagnetic interference; attaching said sensor to said patient anatomy; obtaining an image of said anatomy; indicating a size of each of a plurality of volumes on said image, said plurality of volumes including a predetermined smaller and larger volume, wherein each volume in said plurality of volumes represents at least one distance from said sensor, wherein said larger volume contains said smaller volume; making a determination of whether said region of interest is encompassed by one or more of said volumes; and moving said sensor based on at least said making a determination step such that the region of interest is encompassed by at least one of said volumes.