[en] A procedure for the calculation of the magnetic field generated by various coils is explained and compared to a 1902 approximation by Lyle. This approximation consists of substituting two single loops for a coil with a finite rectangular section. Both methods (exact and approximate) are applied in the case of two magnets used in the design of a nuclear magnetic relaxometer; the agreement between them is quite satisfactory, so that Lyle's approximation can be used even off-axis, outside the region for which it was established.
Disciplines :
Radiology, nuclear medicine & imaging Physics Education & instruction
