Announcing the Chapel Hill Volume Rendering Test Dataset, Volume II
		SoftLab Software Systems Laboratory
		University of North Carolina
		Department of Computer Science
		Chapel Hill, NC  27599-3175

The Chapel Hill Volume Rendering Test Dataset, Volume II is a collection of
the following three data sets:

CT Cadaver Head data - A 113-slice MRI data set of a CT study of
a cadaver head.  Slices are stored consecutively as a 256 x 256 array
with dimensions of z-113 y-256 x-256 in z-y-x order.  Format is 16-bit
integers -- two consecutive bytes make up one binary integer.  14,811,136
bytes total file size.  Data taken on the General Electric CT Scanner and
provided courtesy of North Carolina Memorial Hospital.

CT Cadaver Head data information article - An ascii file containing
acknowledgements for the CT cadaver head data files.

MR Brain data -  A 109-slice MRI data set of a head with
skull partially removed to reveal brain.  256 x 256 array.
with dimensions of Z=109 Y=256 X=256 in z-y-x order.  Format is 16-bit
integers -- two consecutive bytes make up one binary integer. 14,286,848
bytes total file size.  Data taken on the Siemens Magnetom and provided
courtesy of Siemens Medical Systems, Inc., Iselin, NJ.  Data edited 
(skull removed) by Dr. Julian Rosenman, North Carolina Memorial Hospital.

MR Brain data information article - An ascii file containing acknowledgements
for the MR brain data files.

RNA data - A ASCII data set of an electron density map for
Staphylococcus Aureus Ribonuclease with space of (x,y,z) =
(0.94,0.94,0.94) and dimensions z-16, y-120, x-100 in z-y-x order.
961,920 bytes total file size.  Data provided courtesy of Dr. Chris Hill,
University of York.

RNA data information article - An ascii file containing acknowledgements
for the RNA data files.


The datasets were written on a Digital Equipment Corporation (DEC) 
VAX computer.  Each file contains only pixels, stored in row major
order with 2-byte integers per pixel.  To use the images on machines
that have normal byte order (DECs use reverse byte order), you
should swap alternate bytes, for example using the 'dd'
command in UNIX.

We do not object to your further distributing these datasets, but we
request that full acknowledgement of the source of the data accompany
such distribution.  If you are going to send a dataset to someone, please
also send the accompanying information file.

For customers interested in purchasing the datasets on tape, both
Volume I and Volume II can be purchased for $50.00 each, or
$90.00 as a set.  The distribution is available in two different
formats.  The files on the tape will be written from a DEC VAX
computer using the UNIX file copy command 'dd' or the UNIX 'tar'
command.  Total block size is 8192 bytes written at 1600 bpi on
either a standard 1/2" magnetic tape or a cartridge tape.
Please specify your preference when ordering and note that 'dd' is
not available with the cartridge tape.  Installation instructions
accompany the distribution.

**We do not provide any software for displaying this data.

We ask that you report any problems or enhancement to the
address below.

To obain these datasets on tape, or for additional information,
please contact:

Natalie E. Sipes			email: softlab@cs.unc.edu
SoftLab Coordinator			telephone:  919-962-1960
SoftLab Software Systems Laboratory
Department of Computer Science
CB# 3175, 361 Sitterson Hall
University of North Carolina
Chapel Hill, North Carolina  27599-3175