The bfloat Volume Format
The contents below are copied from http://airto.bmap.ucla.edu/BMCweb/HowTo/FileFormats.html
bfloat files contain blocks of floating point numbers representing the image data, and have a small, very short, header that specifies the number of pixels in each of (only)three dimensions, usually interpreted as Y, X and time. Multiple slice locations are generally represented by increasing the y dimension to make a vertical stack format.
2.0 File names
Files are named freely, but must end in .bfloat and must have a matching header file that ends in .hdr
3.0 Other notes
Occasionally (often, in fact) we save files in the bfloat format with multiple slice locations arrayed in a tiled format. e.g., sixteen slices are saved in a four by four array. Although this appears nice on the screen, it is a messy format, as the header contains no specification for the number of slice locations, and each multi-slice collection must be treated as a single image.