Model for Imaging in MRI Using the Rotating RF Field
Figure 6
(a) Magnitude plots of raw axial head images obtained with the RF coil located at four positions with an equal angular interspacing of 90°. (b) and (c) are normalized magnitude and phase plots of the RF coil sensitivity profile obtained by dividing each raw measurement in (a) by the uniform brain reference, followed by thresholding and polynomial fitting. For each of the four images, fast low angle shot (FLASH) imaging sequence was employed with the following parameters: TR = 100 ms, TE = 8.19 ms, field of view (FOV) = 35 × 35 cm, image size , slice thickness (ST) = 5 mm, and flip angle (FA) = 30°.
