private void SaveToDatabase(DicomDataset dataset, string filePath)
{
Patient patient = Patient.FromDataset(dataset);
IDBHelper dbHelper = DBHelperFacotry.GetDBHelper();
dbHelper.AddOrUpdatePatient(ref patient);
Study study = Study.FromDataset(dataset);
study.Patient = patient;
Series series = Series.FromDataset(dataset);
series.Study = study;
Image image = Image.FromDataset(dataset);
image.FilePath = filePath;
image.Series = series;
//add to database
dbHelper.AddImage(ref image);
}