/* ------------------------------------------------------------ */
/* GE MR Signa 4.x header type : GEMS 46-021858 */
#define GE4_HEADER_LENGTH 0x03800 /* 28 x 256 x 2 ( 28 blocks) */
#define GE4_IMAGE_SIZE 0x20000 /* 256 x 256 x 2 (256 blocks) */
/* ---- display constants ---- */
#define GE4_DISP_NONE 0x00
#define GE4_DISP_IMAGE 0x01
#define GE4_DISP_SERIES 0x02
#define GE4_DISP_STUDY 0x04
#define GE4_DISP_ALL 0xff
/* ---- string constants ---- */
#define GE4_IMAGE_TITLE "IMAGE HEADER 04"
#define GE4_SERIES_TITLE "SERIES HEADER 04"
#define GE4_STUDY_TITLE "STUDY HEADER 04"
/* ---- series header field offsets (base + 2 * word_num) ---- */
#define GE4_OFF_SER_TITLE 0x1000 /* = (0x1000) */
#define GE4_OFF_SER_SERIES_NUM 0x103e /* = (0x1000 + 2 * 031) */
#define GE4_OFF_SER_PLANE_TYPE 0x1114 /* = (0x1000 + 2 * 138) */
#define GE4_OFF_SER_PLANE_DESC 0x1116 /* = (0x1000 + 2 * 139) */
#define GE4_OFF_SER_IM_MODE 0x1126 /* = (0x1000 + 2 * 147) */
#define GE4_OFF_SER_PULSE_SEQ 0x112a /* = (0x1000 + 2 * 149) */
#define GE4_OFF_SER_FOV 0x112e /* = (0x1000 + 2 * 151) */
#define GE4_OFF_SER_CENTER 0x1132 /* = (0x1000 + 2 * 153) */
#define GE4_OFF_SER_ORIENT 0x113e /* = (0x1000 + 2 * 159) */
#define GE4_OFF_SER_SCAN_MAT_X 0x118e /* = (0x1000 + 2 * 199) */
#define GE4_OFF_SER_SCAN_MAT_Y 0x1190 /* = (0x1000 + 2 * 200) */
#define GE4_OFF_SER_IM_MAT 0x1192 /* = (0x1000 + 2 * 201) */
/* ---- string lengths ---- */
#define GE4_L_SER_TITLE 16
#define GE4_L_SER_SER_NUM 3
#define GE4_L_SER_PL_DESC 12
/* ---- image header field offsets (base + 2 * word_num) ---- */
#define GE4_OFF_IMG_TITLE 0x1400
#define GE4_OFF_IMG_IM_NUM 0x1458 /* = (0x1400 + 2 * 044) */
#define GE4_OFF_IMG_IM_LOCN 0x1492 /* = (0x1400 + 2 * 073) */
#define GE4_OFF_IMG_TABLE_POSN 0x1496 /* = (0x1400 + 2 * 075) */
#define GE4_OFF_IMG_IM_THICK 0x149a /* = (0x1400 + 2 * 077) */
#define GE4_OFF_IMG_IM_SPACING 0x149e /* = (0x1400 + 2 * 079) */
#define GE4_OFF_IMG_TR 0x14a4 /* = (0x1400 + 2 * 082) */
#define GE4_OFF_IMG_TE 0x14ac /* = (0x1400 + 2 * 086) */
#define GE4_OFF_IMG_TI 0x14b0 /* = (0x1400 + 2 * 088) */
#define GE4_OFF_IMG_NUM_ECHOS 0x14c4 /* = (0x1400 + 2 * 098) */
#define GE4_OFF_IMG_ECHO_NUM 0x14c6 /* = (0x1400 + 2 * 099) */
#define GE4_OFF_IMG_NEX_INT 0x14ca /* = (0x1400 + 2 * 101) */
#define GE4_OFF_IMG_NEX_REAL 0x1524 /* = (0x1400 + 2 * 146) */
#define GE4_OFF_IMG_FLIP_ANGLE 0x155e /* = (0x1400 + 2 * 175) */
/* ---- image header field lengths ---- */
#define GE4_L_IM_TITLE 16
#define GE4_L_IM_NUM 3
/* ---- study header field offsets (base + 2 * word_num) ---- */
#define GE4_OFF_STDY_TITLE 0x0c00
#define GE4_OFF_STDY_NUM 0x0c40 /* = (0x0c00 + 2 * 032) */
#define GE4_OFF_STDY_DATE 0x0c4e /* = (0x0c00 + 2 * 039) */
#define GE4_OFF_STDY_TIME 0x0c5e /* = (0x0c00 + 2 * 047) */
#define GE4_OFF_STDY_PAT_NAME 0x0c6c /* = (0x0c00 + 2 * 054) */
#define GE4_OFF_STDY_PAT_ID 0x0c8c /* = (0x0c00 + 2 * 070) */
#define GE4_OFF_STDY_AGE 0x0c9c /* = (0x0c00 + 2 * 078) */
#define GE4_OFF_STDY_SEX 0x0ca0 /* = (0x0c00 + 2 * 080) */
/* ---- study header field lengths ---- */
#define GE4_L_STDY_TITLE 16
#define GE4_L_STDY_NUM 5
#define GE4_L_STDY_DATE 9
#define GE4_L_STDY_TIME 8
#define GE4_L_STDY_PAT_NAME 32
#define GE4_L_STDY_PAT_ID 12
#define GE4_L_STDY_AGE 3
/* ---------------------------------------------------------------------- */
/* ---- actual data structures ---- */
typedef struct
{
char title [GE4_L_STDY_TITLE + 1];
char num [GE4_L_STDY_NUM + 1];
char date [GE4_L_STDY_DATE + 1];
char time [GE4_L_STDY_TIME + 1];
char pat_name [GE4_L_STDY_PAT_NAME + 1];
char pat_id [GE4_L_STDY_PAT_ID + 1];
char age [GE4_L_STDY_AGE + 1];
char sex;
} ge4_study_t;
typedef struct
{
char title [GE4_L_SER_TITLE+1]; /* words 000-015 */
char series_num[GE4_L_SER_SER_NUM+1]; /* word 031 */
short plane_type; /* word 138 */
char plane_desc[GE4_L_SER_PL_DESC+1]; /* word 139 */
short im_mode; /* word 147 */
short pulse_seq; /* word 149 */
float fov; /* words 151,152 */
float center[3]; /* words 153-158 */
short orient; /* word 159 */
short scan_mat_x; /* word 199 */
short scan_mat_y; /* word 200 */
short im_mat; /* word 201 */
} ge4_series_t;
typedef struct
{
char title [GE4_L_IM_TITLE+1]; /* word 000 */
char im_num[GE4_L_IM_NUM+1]; /* words 044-046 */
float im_loc; /* words 073,074 */
float table_posn; /* words 075,076 */
float im_thickness; /* words 077,078 */
float im_spacing; /* words 079,080 */
float tr; /* uS */ /* words 082,083 */
float te; /* uS */ /* words 082,083 */
float ti; /* uS */ /* words 082,083 */
short num_echoes; /* word 098 */
short echo_num; /* word 099 */
short iNEX; /* word 101 */
float fNEX; /* words 146,147 */
short flip_angle; /* word 175 */
} ge4_image_t;
typedef struct
{
ge4_study_t std_h; /* series header data */
ge4_series_t ser_h; /* series header data */
ge4_image_t im_h; /* image header data */
short * image; /* image data, if non-NULL */
int im_bytes; /* size of image, in bytes */
int swap; /* was the data swapped? */
} ge4_header;
/* global prototypes */
int ge4_read_header ( ge4_header * H, char * filename, int get_image );
int idisp_ge4_image_header ( char * info, ge4_image_t * im );
int idisp_ge4_series_header ( char * info, ge4_series_t * s );
int idisp_ge4_study_header ( char * info, ge4_study_t * st );
int ge4_swap_all_bytes ( ge4_header * h );
int idisp_ge4_series_header ( char * info, ge4_series_t * s );
int ge4_validate_header ( ge4_header * h );
/* ---------------------------------------------------------------------- */
#define GE4M_IND2STR(ind,str_list) \
( ind < 0 || (ind > (sizeof(str_list)/sizeof(char *))) ) ? \
"out-of-range" : str_list[ind]
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