The femur, tibia, patella, and fibula of my right knee, as reconstructed from the MRI data. Axial and saggittal images from the original tape can be seen in the background.
|
On April 4, 1993, I tore a ligament in my right knee while playing basketball. A few days later I went in for NMR images, and noted that they used 1/2 inch magnetic tape to store them. Trying to turn an unfortunate situation into a chance to do something interesting, I hobbled back to the MRI center with my own tape and asked a gracious but somewhat surprised technician to make a copy of the tape. With the help of System Managers Sharon Taylor and Kevin Mullally, I was able to read the image files from the tape to my home directory. I then deciphered the image format, wrote some interactive feature extraction software, and created a 3D spline model of my knee. In order to create the surface mesh, I designed a relaxation algorithm to form correspondences between the slices. This became my project for Brian Barsky's CS284 geometric modeling class. You're more than welcome to download the dataset of 110 256×256 pixel MR Images in TIF format: debevec_knee_images.tar.gz, 6,803,949 bytes.
The images are kind of trippy if you play them back as a movie.
|