Sorry, the single "\" is my mistake. but after changed it to "\\", it still get 0, it's strange, I wonder where's the problem -- View this message in context: http://vtk.1045678.n5.nabble.com/Problem-to-read-the-DICOM-series-using-VTK-tp5741842p5741915.html Sent from the VTK - Users mailing list archive at Nabble.com.