Under one aspect, a method of displaying medical information about a subject having a plurality of regions includes: resolving light obtained from each region of the plurality of regions into a corresponding spectrum selecting a portion of each spectrum, the selected portion including medical information about the corresponding region constructing an image based on the selected portion of each spectrum and projecting the image onto the subject. Under another aspect, a method of displaying medical information about a subject that has a plurality of regions includes: resolving light obtained from each region of the plurality of regions into a corresponding spectrum selecting a portion of each spectrum, the selected portion including medical information about the corresponding region constructing a spectral image based on the selected portion of each spectrum displaying an image of the plurality of regions and displaying the spectral image overlying the image of the plurality of regions.
