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Fix imageData space[2] calc logic.

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This commit is contained in:
Krad
2022-08-11 14:19:28 +08:00
parent f19fb60306
commit 8d586e8db5
1 changed files with 14 additions and 7 deletions
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21
src/src/IO/DICOM/DICOMDirectoryHelper.cpp
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@@ -282,16 +282,23 @@ void DICOMDirectoryHelper::readImageProperty(ExtendMedicalImageProperties* prope
dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0032), position[1], 1);
dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0032), position[2], 2);
double position0[3] ={property->GetPosition()[0], property->GetPosition()[1] , property->GetPosition()[2]};
double zNormal[4] = { position[0] - position0[0],
position[1] - position0[1],
position[2] - position0[2], 1.0};
double zVector_real[3] = {
position[0] - position0[0],
position[1] - position0[1],
position[2] - position0[2]
};
// get slice real distance as space[2]
double space2 = sqrt(vtkMath::Distance2BetweenPoints(position, property->GetPosition()));
vtkMath::Normalize(zNormal);
vtkMath::Normalize(zVector_real);
double Spacing[3] = {.0, .0, .0};
property->GetSpacing(Spacing);
double zNormal2[4] = {.0,.0,.0,1.0};
matrix->MultiplyPoint(zNormal, zNormal2);
Spacing[2] = zNormal2[2]<0?(-1.0*space2):space2;
double* zVector = property->GetZVector();
// if zVector_real is same direction with zVector, the negativeFlag must be true, otherwise will be false.
bool negativeFlag = (zVector_real[0] * zVector[0]) < 0
|| (zVector_real[1] * zVector[1]) < 0
|| (zVector_real[2] * zVector[2]) < 0 ;
// the space[2] will decide the z Axis image heap up direction
Spacing[2] = negativeFlag?(-1.0*space2):space2;
property->SetSpacing(Spacing);
}
}