A magnetic resonance imaging system comprising: a MRI scanner, including a plurality of radio frequency receivers, for imaging objects of interest; at least one processor; and a memory, with computer code instructions stored thereon, the computer code instructions, when executed by the at least one processor, cause the at least one processor to: cause the MRI scanner to perform a first scan, on an anatomy region, according to a first field of view to acquire first multi-spectral MRI data; compute, for each pair of a single RF receiver and a single frequency bin_of a plurality of frequency bins, a respective spectral sensitivity map using at least a portion of the first multi-spectral MRI data, each spectral sensitivity map representing sensitivity of the respective single RF receiver to RF signals, corresponding to the respective single frequency bin, from various voxels of the anatomy region; cause the MRI scanner to perform a second scan according to a second field of view to acquire second multi-spectral MRI data, the second field of view smaller than the first field of view; and reconstruct one or more MRI images according to the second field of view using the second multi-spectral MRI data and the spectral sensitivity maps. a MRI scanner, including a plurality of radio frequency receivers, for imaging objects of interest; at least one processor; and a memory, with computer code instructions stored thereon, the computer code instructions, when executed by the at least one processor, cause the at least one processor to: cause the MRI scanner to perform a first scan, on an anatomy region, according to a first field of view to acquire first multi-spectral MRI data; compute, for each pair of a single RF receiver and a single frequency bin_of a plurality of frequency bins, a respective spectral sensitivity map using at least a portion of the first multi-spectral MRI data, each spectral sensitivity map representing sensitivity of the respective single RF receiver to RF signals, corresponding to the respective single frequency bin, from various voxels of the anatomy region; cause the MRI scanner to perform a second scan according to a second field of view to acquire second multi-spectral MRI data, the second field of view smaller than the first field of view; and reconstruct one or more MRI images according to the second field of view using the second multi-spectral MRI data and the spectral sensitivity maps. cause the MRI scanner to perform a first scan, on an anatomy region, according to a first field of view to acquire first multi-spectral MRI data; compute, for each pair of a single RF receiver and a single frequency bin_of a plurality of frequency bins, a respective spectral sensitivity map using at least a portion of the first multi-spectral MRI data, each spectral sensitivity map representing sensitivity of the respective single RF receiver to RF signals, corresponding to the respective single frequency bin, from various voxels of the anatomy region; cause the MRI scanner to perform a second scan according to a second field of view to acquire second multi-spectral MRI data, the second field of view smaller than the first field of view; and reconstruct one or more MRI images according to the second field of view using the second multi-spectral MRI data and the spectral sensitivity maps.