7/18/00

Format of the *.*.marks files: (CSPINE AND LSPINE FORMAT, EXCEPT AS 
NOTED)

Line 1:Original file name
Line 2: Size of image from which coordinates were taken
Blank line
[Then the marks data follows, in this format:
x	y	vid	vind [comment_code (LSPINE ONLY)]

where x = x coordinate
      y = y coordinate
    vid = vertebra id
   vind = vertebra point index
   comment_code (SEE LSPINE SECTION OF THIS FILE)

The coordinate system used has (0,0) in the upper left corner.
x increases across the image; y increases down the image.

The *.*.marks files are sorted by vid, then by vind.

**************************************************************
EXPLANATION FOR CSPINE MARKS FILES:

vid = 1:    	cspine vertebra 1; only one point was recorded,
                in the approximate center of gravity; vind for
                this case is always 0
vid = 2         cspine vertebra 2; only 3 points were recorded,
                on the lower edge; vinds 4-6 are used for these
                points
vid = 3-7:      cspine vertebra 3-7; 7 points (nominally) were
                recorded; the vinds are numbered 1-7; if
                osteophytes were observed, the vinds for them
                are numbered 8-9
vid = 8:        thoracic spine vertebra 1 (T-1); rarely seen
                in these images
vid = 9:        points defining a rectangle that encloses the
                region of interest for the cervical spine;
                vinds 1 (upper left) and 2 (lower right) are
                used

vind = 1-7:     for vids 2-7, these are the vertebra point
                indices; the numbering scheme is 1-3 across
                the vertebra top, from right to left; 4-6
                across the vertebra bottom from right to
                left; and 7=midpoint of the front vertebra
                boundary
vind = 8-9:     anterior osteophyte indicators; these mark
                anterior osteophytes on the lower (9) or
                upper (8) anterior corners of the vertebra
vind = 1-2:     for vid 9; these indicate the upper left
                and lower right of the bounding rectangle
                for the region of interest
vind = 0:       for vid 1 only; indicates the center of gravity

**************************************************************
EXPLANATION FOR LSPINE MARKS FILES:

vid = 0: 		lspine vertebra T12; in the usual case,
				only 3 points (plus possible osteophyte)
				were recorded, on the lower edge; vinds 4-6
				are used for these points;
				occasionally, the full 7 points were
				recorded, in which case the vinds are
				numbered 1-7
vid = 1-5:		lspine vertebra L1-L5; 7 points (nominally were
				records; the vinds are numbered 1-7; if
				osteophytes were observed, the vinds for them
				are numbered 8-9
vid = 9:		points defining a rectangle that encloses the
				region of interest for the lumbar spine;
				vinds 1 (upper left) and 2 (lower right) are
				used
vid = 11:		lspine vertebra T11; rarely recorded; in these
				cases only 3 points (plus possible osteophyte)
				were recorded, on the lower edge; vinds 4-6
				are used for these points

vind = 1-7:		for vids 1-5, these are the vertebra point
				indices; the numbering scheme is 1-3 across
				the vertebra top, from right to left; 4-6
				across the vertebra bottom from right to
				left; and 7=midpoint of the front vertebra
				boundary
vind = 8-9:		anterior osteophyte indicators; these mark
				anterior osteophytes on the lower (9) or
				upper (8) anterior corners of the vertebra

comment_code = 0,1,999:		the comment of the data recorder,
							numerically coded; the meaning of
							the codes is as follows:
							0 = "open"; i.e. the vertebrae are
							not fused together at this point
							1 = "fused"; i.e. the vertebrae are
							fused together at this point
							999 = blank; no comment was recorded
							these comments were recorded for
							each point where osteophytes were
							observed