The Format of V16 Files

V16 files contain high-resolution anatomical 3D data sets, typically containing the whole brain (head) of subjects. The intensity values are stored as a series of bytes. See the VMR format for a version storing each intensity value with one byte (chars). The V16 format contains a small header followed by the actual data. 

V16 Header

V16 Data

Each data element (intensity value) is represented in short integers (2 bytes). The data is organized in three loops:

DimZ

DimY

DimX

A V16 file is a minimal version of a VMR file, but each intensity value in a VMR is represented by 1 byte instead of 2 bytes.