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.