1. A method of acquiring MR data using a magnetic resonance (MR) imaging system comprising the steps of: segmenting data acquisition into a number of segments for a given slice acquisition; selecting one segment to acquire an amount of MR data unequal to an amount of MR data to be acquired in another segment; acquiring low spatial frequency MR data using an RF coil assembly in the one segment within a first acquisition window; acquiring low and high spatial frequency MR data using the RF coil assembly in the another segment within a second acquisition window that is larger than the first acquisition window; and reconstructing an MR image using the MR data of the first and second acquisition windows.