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. Author manuscript; available in PMC: 2007 Aug 8.
Published in final edited form as: Magn Reson Med. 2001 Apr;45(4):673–683. doi: 10.1002/mrm.1090

FIG. 1.

FIG. 1

MRI signal detection by (a) loop and (b) linear antennas. Here z is the longitudinal direction that is parallel to the static magnetic field B0. The x-y plane is the transverse plane in which the transverse magnetization Mxy(r), originated at point O, rotates with frequency ω to generate a time-varying magnetic field B. In part a a loop antenna is used to detect B. The angle θ is the view angle from the point O. This angle provides the measure of how close the two sides of the loop are. In part b a linear antenna is used to detect B. The distance between point O and the linear antenna is r.