Holography:

Holography is a graphic technology that uses laser light to
produce 3-D images.  Holographic research has demonstrated the
viability of constructing holograms that convey 3-D information
from a variety of imaging sources, including CAT scans, MRI
(magnetic resonance imaging), and laser photography.  There are
currently display and size constraints in the use of holography
due to the sensitivity required of the laser photographic
techniques and the processing power required of the computer
generated techniques.  However, research at the M.I.T. Media Lab
is exploring solutions to these constraining factors.  By
splicing holograms in 4 ft. widths together with imperceptible
seams, immense 3-D representations may be achieved (Brand, 1988).

<ffile55>   Projected Holography