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. Author manuscript; available in PMC: 2010 Nov 19.
Published in final edited form as: NMR Biomed. 2009 Dec 15;23(4):368–374. doi: 10.1002/nbm.1471

Figure 4.

Figure 4

Representative phantom images at 3T (A–C) illustrating the effects of the choice of the imaging flip angle and the SR module on the RF calibration images. Three different sets of acquisition parameters were used: imaging flip angle 10° (A), imaging flip angle 5° (B), and imaging flip angle 10° with the SR module (C). For all three acquisition settings, mean signal intensity measured in the inner area of the phantom (D), as well as the mean signal intensity in the whole phantom (E) coupled with the SD of the signal measured in the whole phantom (F), resulted in the correct RF calibration at κ = 1.06. Note that the automated RF calibration (κ = 1.00) did not produce the expected RF flip angle in the center of the phantom.