1. A method for adjusting an inversion time setting in a magnetic resonance imaging (MRI) scanner, the method comprising: positioning a readout line of the MRI scanner through a compartment of interest of a region of interest in a subject; inverting magnetization within the readout line by playing an inversion pulse; reading out data along the readout line at a predetermined number of times after play of the inversion pulse; determining a T1 value for each pixel along the readout line; determining the pixels that belong to first and second portions within the compartment of interest; determining a T1 value of each of the first and second portions by, for each portion, averaging the pixels within each portion; and determining an inversion time based on the determined T1 values such that the compartment of interest has a desired magnetization in an image to be acquired by an imaging sequence.