dbh.h

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/*
 * 
 * (c) Copyright, 1986-1995
 * Biomedical Imaging Resource
 * Mayo Foundation
 *
 * dbh.h
 *
 *
 * database sub-definitions
 */

struct header_key          		/*      header_key       */
    {                                  		/* off + size*/
        int sizeof_hdr;                		/* 0 + 4     */
        char data_type[10];            		/* 4 + 10    */
        char db_name[18];              		/* 14 + 18   */
        int extents;                   		/* 32 + 4    */
        short int session_error;       		/* 36 + 2    */
        char regular;                  		/* 38 + 1    */
        char hkey_un0;                 		/* 39 + 1    */
    };           				/* total=40  */

struct image_dimension      		/*      image_dimension  */
    {                               		/* off + size*/
        short int dim[8];           		/* 0 + 16    */
        char vox_units[4];			/* 16 + 4    */
        char cal_units[8];			/* 20 + 4    */
        short int unused1;			/* 24 + 2    */
        short int datatype;			/* 30 + 2    */
        short int bitpix;                   	/* 32 + 2    */
        short int dim_un0;                      /* 34 + 2    */
        float pixdim[8];                        /* 36 + 32   */
        		/* 
        			pixdim[] specifies the voxel dimensions:
        			pixdim[1] - voxel width
        			pixdim[2] - voxel height
        			pixdim[3] - interslice distance
        				..etc
        		*/
        float vox_offset;                    	/* 68 + 4    */
        float funused1;                       	/* 72 + 4    */
        float funused2;                      	/* 76 + 4    */
        float funused3;                      	/* 80 + 4    */
        float cal_max;                    	/* 84 + 4    */
        float cal_min;                     	/* 88 + 4    */
        int compressed;                     	/* 92 + 4    */
        int verified;                     	/* 96 + 4    */
        int glmax, glmin;                 	/* 100 + 8   */
    };          				/* total=108 */
         
struct data_history          		/*      data_history     */
    {                                    	/* off + size*/
        char descrip[80];                	/* 0 + 80    */
        char aux_file[24];               	/* 80 + 24   */
        char orient;                     	/* 104 + 1   */
        char originator[10];             	/* 105 + 10  */
        char generated[10];              	/* 115 + 10  */
        char scannum[10];                	/* 125 + 10  */
        char patient_id[10];             	/* 135 + 10  */
        char exp_date[10];               	/* 145 + 10  */
        char exp_time[10];               	/* 155 + 10  */
        char hist_un0[3];                	/* 165 + 3   */
        int views;                       	/* 168 + 4   */
        int vols_added;                  	/* 172 + 4   */
        int start_field;                 	/* 176 + 4   */
        int field_skip;                  	/* 180 + 4   */
        int omax,omin;                   	/* 184 + 8   */
        int smax,smin;                   	/* 192 + 8   */
    };                     			/* total=200 */

struct dsr                 		/*      dsr              */
    {                                  		/* off + size*/
        struct header_key hk;          		/* 0 + 40    */
        struct image_dimension dime;   		/* 40 + 108  */
        struct data_history hist;      		/* 148 + 200 */
    };                     			/* total=348 */
        
/* Acceptable values for hdr.dime.datatype */

#define DT_NONE				0
#define DT_UNKNOWN			0
#define DT_BINARY			1
#define DT_UNSIGNED_CHAR		2
#define DT_SIGNED_SHORT			4
#define DT_SIGNED_INT			8
#define DT_FLOAT			16
#define DT_COMPLEX			32
#define DT_DOUBLE			64
#define DT_RGB				128
#define DT_ALL				255

typedef struct 
	{
	float real;
	float imag;
	} COMPLEX;