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This mailinglist archive is frozen since May 2001, i.e. it will stay online but will not be updated.
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P3D 3-D X-Rays
On May 15 Klaas Morcus inquired about 3-D Z-Rays. Peter Abrahams
subsequently responded with an interesting summation of its use in various
technical and scientific applications.
In 1987 I worked for a short time with Dr. Arthur Fielder, a chiropracter
in Torrance, California who was making 3-D X-Rays and viewing the 8 x 10
stereo pairs on a large Wheatstone chiropractic stereoscope. The stereo
pair was produced by taking one x-ray and then moving the emission head of
the x-ray machine laterally to produce the second eye view; side-step 3-D
x-rays. The 3-D produced was somewhat hyper but this was not a drawback
with applications that were primarily diagnostic. Using this technique
Dr. Fielder and I produced a stereo x-ray of my hands and I subsequently
duped these images to 35 mm film for use in my (twin 35mm) 3-D slide shows
along with other stereographs Dr. Fielder had produced of the neck, spine
and head.
The inventor of modern Chiropractry, Edwin Palmer, in his multivolume set
on the subject (written in the early years of the 20th century) with the
volume titled "Modern X-Ray Practice and Chiropractic Spinography" has a
separate chapter for "The Chiropractic Stereoscope." This chapter
includes a photograph of a Wheatstone stereoscope created for chiropractic
purposes. The stereoscope uses two vertically mounted backlit lightboxes
upon which the (negative) x-ray films are placed at either end for
stereographic viewing.
* * * * * * * *
The Ray Zone Theory of Relative Numbers: 1 + 1 = 3(D)
r3dzone@xxxxxxxxxxxxx
Visit Ray's 3-D website at:
http://www.ray3dzone.com
The 3-D Zone
P.O. Box 741159
Los Angeles, California 90004
323-662-3831
fax-662-3830
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