typedef struct { int nx; int ny; int nz; int mode; int nxstart; int nystart; int nzstart; int mx; int my; int mz; float xlen; float ylen; float zlen; float alpha; float beta; float gamma; int mapc; int mapr; int maps; float amin; float amax; float amean; int ispg; int nsymbt; char extra[116]; float xOrigin; float yOrigin; int nlabl; char label[10][80]; } MRChead;