ENH: Replace pydicom deprecated usage of get_frame_offsets

Author: jamesobutler

src/dicomweb_client/file.py

@@ -32,7 +32,15 @@
 from pydicom.datadict import dictionary_VR, keyword_for_tag, tag_for_keyword
 from pydicom.dataelem import DataElement
 from pydicom.dataset import Dataset, FileMetaDataset
-from pydicom.encaps import encapsulate, get_frame_offsets
+from pydicom.encaps import encapsulate
+try:
+    # pydicom >= 3.0 - parse_basic_offsets replaces get_frame_offsets
+    from pydicom.encaps import parse_basic_offsets
+    _use_parse_basic_offsets = True
+except ImportError:
+    # pydicom < 3.0 - use deprecated get_frame_offsets
+    from pydicom.encaps import get_frame_offsets
+    _use_parse_basic_offsets = False
 from pydicom.errors import InvalidDicomError
 from pydicom.filebase import DicomFileLike
 from pydicom.filereader import data_element_offset_to_value, dcmread
@@ -350,7 +358,13 @@ def _read_bot(fp: DicomFileLike) -> np.ndarray:
         fp.is_implicit_VR, 'OB'
     )
     fp.seek(pixel_data_element_value_offset - 4, 1)
-    is_empty, offsets = get_frame_offsets(fp)
+
+    # Use parse_basic_offsets for pydicom >= 3.0, get_frame_offsets for < 3.0
+    if _use_parse_basic_offsets:
+        offsets = parse_basic_offsets(fp)
+    else:
+        is_empty, offsets = get_frame_offsets(fp)
+
     return np.array(offsets, dtype=np.uint32)