. Author manuscript; available in PMC: 2011 Feb 1.

Published in final edited form as: IEEE Trans Med Imaging. 2010 Feb;29(2):474–481. doi: 10.1109/TMI.2009.2036843

Table I.

Specifications of Coil Excitation Schemes

current in the ith rung

current feed point

generated magnetic field

Scheme 1 (S1)

I_{i}^{rung} = I_{0} sin [(i ‐ 0.5) π / 6]

H_{x}^{1}

and

H_{y}^{1}

Scheme 2 (S2)

I_{i}^{rung} = I_{0} sin [(i ‐ 0.5) π / 6 + π / 2]

90° apart from that of scheme 1

H_{x}^{2}

and

H_{y}^{2}

Scheme 3 (S3)

I_{i}^{rung} = I_{0} sin [(i ‐ 0.5) π / 6 + π / 6]

30° apart from that of scheme 1

H_{x}^{3}

and

H_{y}^{3}