//TODO (cr Oct 2009): return Slice, remove SeriesUID
private VolumeSliceSopDataSource CreateSlice(int sliceIndex, Vector3D throughPoint)
{
float thicknessAndSpacing = Math.Abs(GetSliceSpacing());
VolumeSliceSopDataSource slice = new VolumeSliceSopDataSource(_volume.Volume, _slicerParams, throughPoint);
slice[DicomTags.SliceThickness].SetFloat32(0, thicknessAndSpacing);
slice[DicomTags.SpacingBetweenSlices].SetFloat32(0, thicknessAndSpacing);
slice[DicomTags.SeriesInstanceUid].SetString(0, _seriesInstanceUid);
slice[DicomTags.InstanceNumber].SetInt32(0, sliceIndex + 1);
return(slice);
}
public VolumeSliceSopFrameData(int frameNumber, VolumeSliceSopDataSource parent) : base(frameNumber, parent) {}
protected internal byte[] GetOverlay(Frame baseFrame, out OverlayFrameParams overlayFrameParams)
{
var volume = this.Volume;
// compute the bounds of the target base image frame in patient coordinates
var baseTopLeft = baseFrame.ImagePlaneHelper.ConvertToPatient(new PointF(0, 0));
var baseTopRight = baseFrame.ImagePlaneHelper.ConvertToPatient(new PointF(baseFrame.Columns, 0));
var baseBottomLeft = baseFrame.ImagePlaneHelper.ConvertToPatient(new PointF(0, baseFrame.Rows));
var baseFrameCentre = (baseTopRight + baseBottomLeft)/2;
// compute the rotated volume slicing basis axes
var volumeXAxis = (volume.ConvertToVolume(baseTopRight) - volume.ConvertToVolume(baseTopLeft)).Normalize();
var volumeYAxis = (volume.ConvertToVolume(baseBottomLeft) - volume.ConvertToVolume(baseTopLeft)).Normalize();
var volumeZAxis = volumeXAxis.Cross(volumeYAxis);
var @params = new VolumeSlicerParams(volumeXAxis, volumeYAxis, volumeZAxis);
using (var slice = new VolumeSliceSopDataSource(volume, @params, volume.ConvertToVolume(baseFrameCentre)))
{
using (var sliceSop = new ImageSop(slice))
{
using (var overlayFrame = sliceSop.Frames[1])
{
// compute the bounds of the target overlay image frame in patient coordinates
var overlayTopLeft = overlayFrame.ImagePlaneHelper.ConvertToPatient(new PointF(0, 0));
var overlayTopRight = overlayFrame.ImagePlaneHelper.ConvertToPatient(new PointF(overlayFrame.Columns, 0));
var overlayBottomLeft = overlayFrame.ImagePlaneHelper.ConvertToPatient(new PointF(0, overlayFrame.Rows));
var overlayOffset = overlayTopLeft - baseTopLeft;
// compute the overlay and base image resolution in pixels per unit patient space (mm).
var overlayResolutionX = overlayFrame.Columns/(overlayTopRight - overlayTopLeft).Magnitude;
var overlayResolutionY = overlayFrame.Rows/(overlayBottomLeft - overlayTopLeft).Magnitude;
var baseResolutionX = baseFrame.Columns/(baseTopRight - baseTopLeft).Magnitude;
var baseResolutionY = baseFrame.Rows/(baseBottomLeft - baseTopLeft).Magnitude;
// compute parameters to register the overlay on the base image
var scale = new PointF(baseResolutionX/overlayResolutionX, baseResolutionY/overlayResolutionY);
var offset = new PointF(overlayOffset.X*overlayResolutionX, overlayOffset.Y*overlayResolutionY);
//TODO (CR Sept 2010): could this be negative?
// validate computed transform parameters
Platform.CheckTrue(overlayOffset.Z < 0.5f, "Compute OffsetZ != 0");
overlayFrameParams = new OverlayFrameParams(
overlayFrame.Rows, overlayFrame.Columns,
overlayFrame.BitsAllocated, overlayFrame.BitsStored,
overlayFrame.HighBit, overlayFrame.PixelRepresentation != 0 ? true : false,
overlayFrame.PhotometricInterpretation == PhotometricInterpretation.Monochrome1 ? true : false,
overlayFrame.RescaleSlope, overlayFrame.RescaleIntercept,
scale, offset);
return overlayFrame.GetNormalizedPixelData();
}
}
}
}
//TODO (cr Oct 2009): return Slice, remove SeriesUID
private VolumeSliceSopDataSource CreateSlice(int sliceIndex, Vector3D throughPoint)
{
float thicknessAndSpacing = Math.Abs(GetSliceSpacing());
VolumeSliceSopDataSource slice = new VolumeSliceSopDataSource(_volume.Clone(), _slicerParams, new[]{throughPoint});
slice[DicomTags.SliceThickness].SetFloat32(0, thicknessAndSpacing);
slice[DicomTags.SpacingBetweenSlices].SetFloat32(0, thicknessAndSpacing);
slice[DicomTags.SeriesInstanceUid].SetString(0, _seriesInstanceUid);
slice[DicomTags.InstanceNumber].SetInt32(0, sliceIndex + 1);
return slice;
}
public VolumeSliceSopFrameData(int frameNumber, VolumeSliceSopDataSource parent)
: base(frameNumber, parent)
{
}
