1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
|
unit hdr;
interface
{$H+}
uses nifti_hdr,define_types,classes;
procedure MakeStatHdr (var lBGHdr,lStatHdr: TniftiHdr; lMinIntensity,lMaxIntensity,lIntent_p1,lIntent_p2,lIntent_p3: single; lIntent_code: smallint;lIntentName: string);
procedure MakeHdr (var lBGHdr,lStatHdr: TniftiHdr);
function NIFTIhdr_SaveHdrImg (var lFilename: string; var lHdr: TNIFTIHdr; lAllowOverwrite,lSPM2,lSingleFile: boolean;var lImg: SingleP; lnVol: integer): boolean;
function NIFTIhdr_SaveHdrImg8 (var lFilename: string; var lHdr: TNIFTIHdr; lAllowOverwrite,lSPM2,lSingleFile: boolean;var lImg: ByteP; lnVol: integer): boolean;
function Files4D (lFilename: string): boolean;
function Vol4D (lFilename: string): integer;
function FileExists4D (lFilename: string): boolean;
function Filename4D(lFilename: string): string;
function FilenameVol4D (lFilename: string; var lBaseName: string; var lVol: integer): boolean;
function NIFTIhdr_HdrVolumes (lFilenameIn: string): integer;
function BPP (lDataType: integer): integer;
function CreateDecompressed4D(var lImageNames: TStrings): string;
function CheckVoxels(var lHdrNameIn : string; lMaskVoxels, lImageNumber: integer):boolean;
//function CheckVoxelsGroupX(var lG: TStrings; lMaskVoxels: integer):boolean;
function CheckVoxelsGroupX(var lG: TStrings; lMaskHdr: TMRIcroHdr): boolean;
//function CheckVoxelsGroupY(var lG: TStrings):boolean;
procedure DeleteDecompressed4D(lDecomName: string);
implementation
uses
{$IFDEF FPC} gzio2,Controls,
{$ELSE} {gzio,ZLib,}DiskSpaceKludge,gziod,{$ENDIF}
{$IFNDEF UNIX}Windows, {$ENDIF}
Dialogs ,SysUtils,StatThdsUtil,npmform;
//define_types,GraphicsMathLibrary;
{$IFDEF FPC} {$mode objfpc}{$H+} {$ENDIF}
procedure MsgX (lStr: string);
begin
//msgx
end;
procedure DeleteDecompressed4D(lDecomName: string);
begin
if lDecomName = '' then
exit;
if not fileexists(lDecomName) then
exit;
sysutils.deletefile(lDecomName);
end;
function CheckVoxels(var lHdrNameIn : string; lMaskVoxels, lImageNumber: integer):boolean;
var
lHdr: TMRIcroHdr;
lHdrName: string;
lVox: integer;
begin
result := false;
lHdrName := Filename4D(lHdrNameIn);
if not NIFTIhdr_LoadHdr(lHdrName,lHdr) then begin
MainForm.NPMmsg('Unable to load image '+lHdrName);
exit;
end;
lVox := ComputeImageDataBytes8bpp(lHdr);
if lVox <> lMaskVoxels then begin
MainForm.NPMmsg('Voxels differ for '+lHdrName+' expected '+inttostr(lMaskVoxels)+' described '+inttostr(lVox));
exit;
end;
(*if (lHdr.NIFTIhdr.bitpix <> 8) and (lHdr.NIFTIhdr.datatype <> kDT_FLOAT) and (lHdr.NIFTIhdr.datatype <> kDT_SIGNED_INT) then begin
showmessage('Error: This software can only read uncompressed images that are either 8-bit integer or 32-bit real precision.');
exit;
end; //beta *)
if UpCaseExt(lHdrName) = '.HDR' then
lHdrName := changefileext(lHdrName,'.img');
if (not GzExt(lHdrName) ) and (FSize(lHdrName) < lMaskVoxels) then begin
showmessage('The uncompressed image data should be at least '+inttostr(lMaskVoxels)+' bytes. '+lHdrName);
exit;
end;
result := true;
//gBitPixRA[lImageNumber] := lHdr.NIFTIhdr.bitpix;
gDataTypeRA[lImageNumber] := lHdr.NIFTIhdr.datatype;
gOffsetRA[lImageNumber] := lHdr.NIFTIhdr.vox_offset;
gScaleRA[lImageNumber] := lHdr.NIFTIhdr.scl_slope;
gInterceptRA[lImageNumber] := lHdr.NIFTIhdr.scl_inter;
end;
(*function CheckVoxelsGroup(var lG: TStrings; lMaskVoxels: integer):boolean;
var
lC: integer;
lHdrName : string;
begin
result := false;
if lG.count < 1 then exit;
for lC := 1 to lG.count do begin
lHdrName:= lG[lC-1];
result := CheckVoxels(lHdrName, lMaskVoxels,lC);
end;
end;*)
(*function CheckVoxelsGroup(var lG: TStrings; lMaskVoxels: integer):boolean;
var
lC: integer;
lHdrName : string;
begin
result := false;
if lG.count < 1 then exit;
for lC := 1 to lG.count do begin
lHdrName:= lG[lC-1];
if not CheckVoxels(lHdrName, lMaskVoxels,lC) then begin
if not fileexists (lHdrName) then
MainForm.NPMmsg('File not found "'+lHdrName+'"')
else
MainForm.NPMmsg('Problem with "'+lHdrName+'" expected '+inttostr(lMaskVoxels));
exit;
end;
end;
result := true;
end;*)
function SameTransform (A,B:TNIFTIhdr): boolean;
var
lDim: integer;
begin
result := false;
for lDim := 0 to 3 do begin
if A.srow_x[lDim] <> B.srow_x[lDim] then
exit;
if A.srow_y[lDim] <> B.srow_y[lDim] then
exit;
if A.srow_z[lDim] <> B.srow_z[lDim] then
exit;
end;
result := true;
end;
function TransformTxt (A:TNIFTIhdr): string;
var
lDim: integer;
begin
result := '[';
for lDim := 0 to 3 do
result := result + ' '+floattostr(A.srow_x[lDim]);
result := result + ';';
for lDim := 0 to 3 do
result := result + ' '+floattostr(A.srow_y[lDim]);
result := result + ';';
for lDim := 0 to 3 do
result := result + ' '+floattostr(A.srow_z[lDim]);
result := result + ']';
end;
function CheckVoxelsX(var lHdrNameIn : string; lMaskHdr: TMRIcroHdr; lImageNumber: integer):boolean;
var
lHdr: TMRIcroHdr;
lHdrName: string;
lDim: integer;
begin
result := false;
lHdrName := Filename4D(lHdrNameIn);
if not NIFTIhdr_LoadHdr(lHdrName,lHdr) then begin
MainForm.NPMmsg('Unable to load image '+lHdrName);
exit;
end;
(*lVox := ComputeImageDataBytes8bpp(lHdr);
lMaskVoxels := ComputeImageDataBytes8bpp(lMaskHdr);
if lVox <> lMaskVoxels then begin
MainForm.NPMmsg('Voxels differ for '+lHdrName+' expected '+inttostr(lMaskVoxels)+' described '+inttostr(lVox));
exit;
end; *)
for lDim := 1 to 3 do begin
if (lHdr.NIFTIhdr.dim[lDim] <> lMaskHdr.NIFTIhdr.dim[lDim]) then begin
MainForm.NPMmsg('Dimension '+inttostr(lDim)+' of '+lHdrName+' does not match '+lMaskHdr.HdrFileName);
exit;
end;
end;
if (not lHdr.NIfTItransform) then
MainForm.NPMmsg('Warning: no spatial transform for '+lHdrName+' (Analyze not NIfTI). Please ensure images are coregistered.')
else if (not lMaskHdr.NIfTItransform) then
MainForm.NPMmsg('Warning: no spatial transform for '+lMaskHdr.HdrFileName+' (Analyze not NIfTI). Please ensure images are coregistered.')
else begin
if not SameTransform (lHdr.NIFTIhdr, lMaskHdr.NIFTIhdr) then begin
MainForm.NPMmsg('Warning: spatial transforms differ for '+lHdrName+' and '+lMaskHdr.HdrFileName);
MainForm.NPMmsg(TransformTxt(lHdr.NIFTIhdr)+' <> '+ TransformTxt(lMaskHdr.NIFTIhdr));
end;
end;
(*if (lHdr.NIFTIhdr.bitpix <> 8) and (lHdr.NIFTIhdr.datatype <> kDT_FLOAT) and (lHdr.NIFTIhdr.datatype <> kDT_SIGNED_INT) then begin
showmessage('Error: This software can only read uncompressed images that are either 8-bit integer or 32-bit real precision.');
exit;
end; //beta *)
if UpCaseExt(lHdrName) = '.HDR' then
lHdrName := changefileext(lHdrName,'.img');
if (not GzExt(lHdrName) ) and (FSize(lHdrName) < (lHdr.NIFTIhdr.dim[1]*lHdr.NIFTIhdr.dim[2]*lHdr.NIFTIhdr.dim[3])) then begin
showmessage('The file size appears too small '+lHdrName);
exit;
end;
result := true;
//gBitPixRA[lImageNumber] := lHdr.NIFTIhdr.bitpix;
gDataTypeRA[lImageNumber] := lHdr.NIFTIhdr.datatype;
gOffsetRA[lImageNumber] := lHdr.NIFTIhdr.vox_offset;
gScaleRA[lImageNumber] := lHdr.NIFTIhdr.scl_slope;
gInterceptRA[lImageNumber] := lHdr.NIFTIhdr.scl_inter;
end;
function CheckVoxelsGroupX(var lG: TStrings; lMaskHdr: TMRIcroHdr):boolean;
var
lC: integer;
lHdrName : string;
begin
result := false;
if lG.count < 1 then exit;
for lC := 1 to lG.count do begin
lHdrName:= lG[lC-1];
if not CheckVoxelsX(lHdrName, lMaskHdr,lC) then begin
if not fileexists (lHdrName) then
MainForm.NPMmsg('File not found "'+lHdrName+'"')
else
MainForm.NPMmsg('Problem with "'+lHdrName);
exit;
end;
end;
result := true;
end;
(*function CheckVoxelsGroupY(var lG: TStrings):boolean;
var
lMaskHdr: TMRIcroHdr;
lS: string;
begin
result := false;
if lG.count < 1 then exit;
lS := lG[0];
if not NIFTIhdr_LoadHdr(lS,lMaskHdr) then begin
MainForm.NPMmsg('Unable to load image '+lS);
exit;
end;
result := CheckVoxelsGroupX(lG,lMaskHdr);
end; *)
function BPP (lDataType: integer): integer;
begin
result := 0;
case lDataType of
kDT_UNSIGNED_CHAR: result := 1;
kDT_SIGNED_SHORT: result := 2; // signed short (16 bits/voxel)
kDT_SIGNED_INT : result := 4; // signed int (32 bits/voxel)
kDT_FLOAT : result := 4; // float (32 bits/voxel)
kDT_COMPLEX : result := 8; // complex (64 bits/voxel)
end;
end;
function NIFTIhdr_HdrVolumes (lFilenameIn: string): integer;
var
lFilename: string;
lHdr: TMRIcroHdr;
begin
result := 0;
lFilename := lFilenameIn;
if not NIFTIhdr_LoadHdr (lFilename, lHdr)then exit;
result := lHdr.niftiHdr.dim[4];
end;
function FileExists4D (lFilename: string): boolean;
var
lBaseName: string; var lVol: integer;
begin
FilenameVol4D (lFilename, lBasename,lVol);
result := fileexists(lBasename);
end;
function FilenameVol4D (lFilename: string; var lBaseName: string; var lVol: integer): boolean;
//4D files end with the image index number c:\dir\filename:1
//returns true if 4D file (with lVol = volume), otherwise returns false with lvol = 1
var
lLen,lP: integer;
lNumStr: string;
begin
lVol := 1;
lBasename := lFilename;
result := false;
lLen := length(lFilename);
if lLen < 1 then exit;
lP := lLen;
lNumStr := '';
while (lP > 0) and (lFilename[lP] in ['0'..'9']) do begin
lNumStr := lFilename[lP]+lNumStr;
dec(lP);
end;
//showmessage(lNumStr + '*'+lFilename[lP]);
if (lNumStr = '') or (lP < 2) or (lFilename[lP] <> ':') then exit;
lVol := strtoint(lNumStr);
lLen := lP -1;
lBasename := '';
for lP := 1 to lLen do
lBasename := lBasename + lFilename[lP];
result := true;
end;
function Filename4D(lFilename: string): string;
var lVol: integer;
begin
FilenameVol4D (lFilename, result,lVol);
end;
function Vol4D (lFilename: string): integer;
var
lBaseName: string;
begin
FilenameVol4D (lFilename, lBasename,result);
end;
function Files4D (lFilename: string): boolean;
var
lBaseName: string; var lVol: integer;
begin
result := FilenameVol4D (lFilename, lBasename,lVol);
end;
function CreateDecompressed4D(var lImageNames: TStrings): string;
//returns temp filename if all imagenames are a single compressed 4D datafile
//this means that a nii.gz file is only decompressed once, instead of once per volume*plank
var
lP: integer;
lFilename : string;
begin
result := '';
if lImageNames.Count < 2 then
exit;
if not Files4D(lImageNames.Strings[0]) then exit;
lFilename := Filename4D(lImageNames.Strings[0]);
if not Fileexists(lFilename) then
exit;
if not GzExt(lFilename) then
exit; //not a decompressed file
//see if single 4D image
for lP := 2 to lImageNames.Count do
if not Files4D(lImageNames.Strings[lP-1]) then
exit;
for lP := 2 to lImageNames.Count do
if lFilename <> Filename4D(lImageNames.Strings[lP-1]) then
exit;
//find unique filename for extracted file
result := lFilename +'.nii';
while fileexists(result) do //make sure we do not overwrite anything
result := lFilename +inttostr(random(9999))+'.nii';
//unzip
Msgx('Decompressing 4D image '+lFilename+ ' -> '+result);
Gunzip(lFilename,result);
//set image names to point to uncompressed volume
for lP := 1 to lImageNames.Count do
lImageNames.Strings[lP-1] := result +':'+inttostr(Vol4D(lImageNames.Strings[lP-1]) );
end;
procedure MakeStatHdr (var lBGHdr,lStatHdr: TniftiHdr; lMinIntensity,lMaxIntensity,lIntent_p1,lIntent_p2,lIntent_p3: single; lIntent_code: smallint;lIntentName: string);
var lIntentNameLen,lPos: integer;
lStr: string;
begin
move(lBGHdr,lStatHdr,sizeof(TniftiHdr));
with lStatHdr do begin
magic :=kNIFTI_MAGIC_SEPARATE_HDR;
bitpix := 32; //32-bit real data
datatype := kDT_FLOAT;
scl_slope:= 1;
scl_inter:= 0;
glmin := round(lMinIntensity);
glmax := round(lMaxIntensity);
intent_code := lIntent_Code;// kNIFTI_INTENT_ESTIMATE;
intent_p1 := lIntent_p1;
intent_p2 := lIntent_p2;
intent_p3 := lIntent_p3;
lIntentNameLen := length(lIntentName);
descrip[1] := 'N';
descrip[2] := 'P';
descrip[3] := 'M';
if lIntent_code=kNIFTI_INTENT_TTEST then begin
descrip[4] := 't' ;
lStr := inttostr(trunc(lIntent_p1));
for lPos := 1 to length (lStr) do
descrip[4+lPos] := lStr[lPos] ;
end else
descrip[4] := 'z';
if lIntentNameLen > sizeof(intent_name) then
lIntentNameLen := sizeof(intent_name);
if lIntentNameLen > 0 then
for lPos := 1 to lIntentNameLen do
intent_name[lPos] := lIntentName[lPos];
end;
end;
procedure SaveAsVOIorNIFTIcore (var lFilename: string; var lNiftiHdr: TNIFTIHdr; var lImg: SingleP; lnVolIn,lImgBufferBPP: integer);
const
kImgOffset = 352; //header is 348 bytes, but 352 is divisible by 8...
var
lHdr: TNIFTIhdr;
lBuff: ByteP;
lF: File;
lCompressedFilename,lExt: string;
lnVol,lC,lFSize: integer;
lImgBuffer: ByteP; lImgBufferItems{, lImgBufferBPP}: integer;
begin
lnVol := lnVolIn;
move(lNiftiHdr,lHdr,sizeof(lHdr));
lImgBufferItems := lHdr.dim[1]*lHdr.dim[2]*lHdr.dim[3];
//lImgBufferBPP:= 4;
lImgBuffer := ByteP(lImg);
lExt := UpCaseExt(lFileName);
if DiskFreeEx(lFilename) < (kImgOffset+(lImgBufferItems*lImgBufferBPP*lnVol)) then begin
case MessageDlg('Very little space on the selected drive. Attempt to save to this disk?', mtConfirmation,
[mbYes, mbCancel], 0) of
{$IFDEF FPC}mrCancel: exit; {$ELSE} id_Cancel: exit;{$ENDIF}
end; //case
end;
if FileExistsEX(lFileName) then begin
case MessageDlg('Overwrite the file named '+lFileName+'?', mtConfirmation,
[mbYes, mbCancel], 0) of
{$IFDEF FPC}mrCancel: exit; {$ELSE} id_Cancel: exit;{$ENDIF} //requires Uses Controls
end; //case
end; //file exists
if (lExt='.VOI') then begin
lHdr.intent_name[1] := 'B';//Binary
lHdr.scl_slope := 1/kVOI8bit;
lHdr.scl_inter := 0;
end;
if lnVol < 2 then begin
lHdr.dim[0] := 3;//3D july2006
lHdr.dim[4] := 1;//3D Aug 2007
lnVol := 1;
end else begin
lHdr.dim[0] := 4;//3D july2006
lHdr.dim[4] := lnVol;//3D july2006
end;
(*if not (lImgBufferItems = (lHdr.dim[1]*lHdr.dim[2]*lHdr.dim[3])) then begin //july2006
lHdr.sform_code := 1;
WriteNiftiMatrix ( lHdr, //must match MAGMA in nifti_hdr
gBGImg.ScrnMM[1],0,0,(gBGImg.ScrnOri[1]-1)*-gBGImg.ScrnMM[1],
0,gBGImg.ScrnMM[2],0,(gBGImg.ScrnOri[2]-1)*-gBGImg.ScrnMM[2],
0,0,gBGImg.ScrnMM[3],(gBGImg.ScrnOri[3]-1)*-gBGImg.ScrnMM[3]);
end;*)
if not IsNifTiMagic(lHdr) then begin
{lHdr.sform_code := 1;
WriteNiftiMatrix ( lHdr, //must match MAGMA in nifti_hdr
gBGImg.ScrnMM[1],0,0,(gBGImg.ScrnOri[1]-1)*-gBGImg.ScrnMM[1],
0,gBGImg.ScrnMM[2],0,(gBGImg.ScrnOri[2]-1)*-gBGImg.ScrnMM[2],
0,0,gBGImg.ScrnMM[3],(gBGImg.ScrnOri[3]-1)*-gBGImg.ScrnMM[3]);
}
end;
case lImgBufferBPP of
4: begin
lHdr.bitpix := 32;
lHdr.datatype := kDT_FLOAT;//note 32-bit integers saved internally as 32-bit float
end;
2: begin
lHdr.bitpix := 16;
lHdr.datatype := kDT_SIGNED_SHORT;
end;
1: begin
lHdr.bitpix := 8;
lHdr.datatype := kDT_UNSIGNED_CHAR;
//lHdr.scl_inter := lHdr.WindowScaledMin;
//lHdr.scl_slope := (lHdr.WindowScaledMax-lHdr.WindowScaledMin) /255;
end;
else begin
showmessage('Error: Unsupported bytes per voxel: '+inttostr(lImgBufferBPP));
exit;
end;
end;
if (lExt='.IMG') or (lExt ='.HDR') then begin
//done previously lHdr.magic := kNIFTI_MAGIC_SEPARATE_HDR;
lHdr.vox_offset := 0;
Filemode := 1;
//next write header data as .hdr
lFilename := changeFileExt(lFilename,'.hdr');
AssignFile(lF, lFileName);
Rewrite(lF,sizeof(TNIFTIhdr));
BlockWrite(lF,lHdr, 1);
CloseFile(lF);
//next write image data as .img
lFilename := changeFileExt(lFilename,'.img');
AssignFile(lF, lFileName); {WIN}
Rewrite(lF,lImgBufferItems*lImgBufferBPP*lnVol);
BlockWrite(lF,lImgBuffer^,1);
CloseFile(lF);
Filemode := 2;
exit;
end; //separate header
lHdr.magic := kNIFTI_MAGIC_EMBEDDED_HDR;
lHdr.vox_offset := kImgOffset;//352 bytes
lFSize := kImgOffset+(lImgBufferItems*lImgBufferBPP*lnVol);
getmem(lBuff,lFSize);
move(lHdr,lBuff^,sizeof(lHdr));
//Next: NIfTI 1.1 requires bytes 349..352 set to zero when no XML information
lC := kImgOffset;
lBuff^[lC-3] := 0;
lBuff^[lC-2] := 0;
lBuff^[lC-1] := 0;
lBuff^[lC] := 0;
lC := kImgOffset+1;
move(lImgBuffer^[1],lBuff^[lC],lImgBufferItems*lImgBufferBPP*lnVol);
if (lExt='.NII') then begin
Filemode := 1;
AssignFile(lF, lFileName);
Rewrite(lF,lFSize);
BlockWrite(lF,lBuff^,1);
CloseFile(lF);
Filemode := 2;
exit;
end; //uncompressed
if (lExt<>'.VOI') then
lCompressedFilename := changefileextX(lFilename,'.nii.gz')
else
lCompressedFilename := lFilename;
//FX(lFSize);
GZipBuffer(lCompressedFilename,lBuff,lFSize,false);
freemem(lBuff);
end;
procedure MakeHdr (var lBGHdr,lStatHdr: TniftiHdr);
//lIntent kNIFTI_INTENT_CHISQ lIntent_p1 = DOF
//lIntent kNIFTI_INTENT_ZSCORE no params
//lIntent kNIFTI_INTENT_TTEST lIntent_p1 = DOF
begin
move(lBGHdr,lStatHdr,sizeof(TniftiHdr));
with lStatHdr do begin
magic :=kNIFTI_MAGIC_SEPARATE_HDR;
bitpix := 32; //32-bit real data
datatype := kDT_FLOAT;
scl_slope:= 1;
scl_inter:= 0;
descrip[1] := 'X';//can not be npm
end;
end;
function NIFTIhdr_SaveHdrImg (var lFilename: string; var lHdr: TNIFTIHdr; lAllowOverwrite,lSPM2,lSingleFile: boolean;var lImg: SingleP; lnVol: integer): boolean;
var
lOutNameMod: string;
lSPM2output: boolean;
begin
lOutNameMod := lFilename;
lOutNameMod := changefileextX(lOutNameMod,'.hdr');
lSPM2output := lSPM2;
//fx(lHdr.srow_x[3],lHdr.srow_y[3],lHdr.srow_z[3]);
(*if not IsNifTiMagic(lHdr) then
lSPM2output := true;*)
if (lSingleFile) and (not lSPM2output) then begin
lHdr.magic := kNIFTI_MAGIC_EMBEDDED_HDR;
lOutNameMod := changefileextX(lOutNameMod,'.nii.gz');
end else if (not lSPM2output) then
lHdr.magic := kNIFTI_MAGIC_SEPARATE_HDR
else //the nifti_hdr reader converts the Analyze to NIfTI, so we need to save as NIfTI with NPM
lHdr.magic := kNIFTI_MAGIC_SEPARATE_HDR;
//lHdr.magic := 1984;
SaveAsVOIorNIFTIcore (lOutNameMod, lHdr, lImg,lnVol,4);
end;
function NIFTIhdr_SaveHdrImg8 (var lFilename: string; var lHdr: TNIFTIHdr; lAllowOverwrite,lSPM2,lSingleFile: boolean;var lImg: ByteP; lnVol: integer): boolean;
var
lOutNameMod: string;
begin
lOutNameMod := lFilename;
if IsVOIExt (lOutNameMod) then begin
lHdr.magic := kNIFTI_MAGIC_EMBEDDED_HDR;
end else begin
lOutNameMod := changefileextX(lOutNameMod,'.hdr');
if (lSingleFile) and (not lSPM2) then begin
lHdr.magic := kNIFTI_MAGIC_EMBEDDED_HDR;
lOutNameMod := changefileextX(lOutNameMod,'.nii.gz');
end else if (not lSPM2) then
lHdr.magic := kNIFTI_MAGIC_SEPARATE_HDR
else
lHdr.magic := 1984;
end;
SaveAsVOIorNIFTIcore (lOutNameMod, lHdr, SingleP(lImg),lnVol,1);
end;
end.
|