private static String getSliceLabel(ImageStack stack, int n) {
String info = stack.getSliceLabel(n);
if ((info==null || info.length()<100) && stack.isVirtual()) {
String dir = ((VirtualStack)stack).getDirectory();
String name = ((VirtualStack)stack).getFileName(n);
DICOM reader = new DICOM();
info = reader.getInfo(dir+name);
if (info!=null)
info = name + "\n" + info;
}
return info;
}