add capability to a dump a dicom header to dicom module

mu_map/file/dicom.py

@@ -124,3 +124,13 @@ def change_uid(dcm: pydicom.dataset.FileDataset) -> pydicom.dataset.FileDataset:
     dcm.SeriesInstanceUID = UID_PREFIX + str(random.randint(10000000000000, 99999999999999))
     dcm.SOPInstanceUID = UID_PREFIX + str(random.randint(10000000000000, 99999999999999))
     return dcm
+
+if __name__ == "__main__":
+    import argparse
+
+    parser = argparse.ArgumentParser(description="Dump the header of a DICOM image", formatter_class=argparse.ArgumentDefaultsHelpFormatter)
+    parser.add_argument("file", type=str, help="the DICOM file of which the header is dumped")
+    args = parser.parse_args()
+
+    dcm = pydicom.dcmread(args.file)
+    print(dcm)