This table describes the Slices Volume byte structure.  It consists of a 10000 byte header containing a volume/file description followed by uncompressed volume data.
 

Contents	Data type	Number	Length, bytes	Byte offset from beginning of file	Comments
The text "mdvol"	char, 1 byte	5	5	0	Identifier for this file type
The text "1"	char, 1 byte	1	1	5	mdvol file version indicator.
10000	int, 4 bytes	1	4	6	Length of header, for an mdvol version 1.
Volume dimensions, xyz in pixels.	int, 4 bytes	3	12	10	Must correspond with the length of volume values.
Physical dimensions, xyz in mm, of each voxel	float, 4 bytes	3	12	22	Use 0.0,0.0,0.0 when voxel size is not specified.
Black point and white point for the initial display, with a range [0,1]	float, 4 bytes	2	8	34	These values may be used to construct a LUT for display purposes. Use 0.0,1.0 for default display.
Gamma for the initial display, > 0	float, 4 bytes	1	4	42	This value may be used to construct a LUT for display purposes. Use 1.0 for default linear display. Gamma is applied after the black/white point
Color code: The text "g08", "g16", or "c24"	char, 1 byte	3	3	46	This color code specifies the type of image data: grayscale 8 bit, grayscale 16 bit, or color 24 bit (3 bytes in RGB order) respectively.
Text description of the file format.	char, 1 byte	4900	4900	49	**See below for text to use. Fill unused length with space characters.
Text title for the volume	char, 1 byte	151	151	4949	Fill unused length with space characters.
Text description of the volume	char, 1 byte	4900	4900	5100	Fill unused length with space characters.
Image values. Color code – value order: g08 – x/y/z order   g16 – x/y/z order   c24 – rgb/x/y/z order	byte, 1 byte	g08 – x*y*z   g16 – 2*x*y*z   c24 – 3*x*y*z	x*y*z   2*x*y*z   3*x*y*z	10000	One byte/voxel (8 bit positive integers), x varies fastest. Two bytes/voxel (16 bit positive integers) One byte/color, three bytes/voxel.

** Insert the following as the "Text description of the file format":

"  This is a simple file, consisting of a header and a set of value bytes, for storing volume image data. Specified by Mark Dow, January 2001. The header is a total of 10000 bytes: The first five characters (mdvol, 5 x 1 byte) identify the file as volume with this file type. One character, 1 byte, serves as a version indicator -- this is version 1. One integer, 4 bytes, is the total length of the header. Three integers are dimensions, xyz in pixels, of the volume. Three floats, 3x4 bytes, are physical dimensions, xyz in mm, of each voxel. Two floats indicate a reasonable black point and white point for the initial display, with a range [0,1]. One float indicates a reasonable gamma for the initial display where the gamma is applied after the black/white point. Three characters specifies gray 8 bit, g08, gray 16 bit, g16, or color 24 bit, c24, byte information. 4900 characters, 4900 x 1 byte, of text is this description of the file format. 151 characters are a text title. 4900 characters are a text description of the volume contents. The rest are bytes, in x/y/z or rgb/x/y/z order, describing the image data. If the color character is g08, there are x*y*z bytes of color data. If the color code is g16, there are 2*x*y*z bytes of color data. If the color character is c24, there are 3*x*y*z bytes of color data.  "