addSeriesMeta("ThumbnailX", ras.readInt());
addSeriesMeta("ThumbnailY", ras.readInt());
// pixel sizes are stored in meters, we need them in microns
pixelSizeX = ras.readDouble() * 1000000;
pixelSizeY = ras.readDouble() * 1000000;
pixelSizeZ = ras.readDouble() * 1000000;
addSeriesMeta("VoxelSizeX", new Double(pixelSizeX));
addSeriesMeta("VoxelSizeY", new Double(pixelSizeY));
addSeriesMeta("VoxelSizeZ", new Double(pixelSizeZ));