Get an error when reading dicom segmentation

[binliunls]

Describe the bug
When I tried to read the dicom segmentation label with LoadImage in MONAI transforms, it reported a bug shown below.

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/venv/lib/python3.11/site-packages/monai/transforms/io/array.py", line 290, in __call__
    img_array, meta_data = reader.get_data(img)
                           ^^^^^^^^^^^^^^^^^^^^
  File "/venv/lib/python3.11/site-packages/monai/data/image_reader.py", line 586, in get_data
    data_array, metadata = self._get_seg_data(d)
                           ^^^^^^^^^^^^^^^^^^^^^
  File "/venv/lib/python3.11/site-packages/monai/data/image_reader.py", line 770, in _get_seg_data
    class_name = description.SegmentDescription
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/venv/lib/python3.11/site-packages/pydicom/dataset.py", line 908, in __getattr__
    return object.__getattribute__(self, name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'Dataset' object has no attribute 'SegmentDescription'

To Reproduce
Steps to reproduce the behavior:

1. Install the MONAI main branch.
2. Download the attachment dcm file whose md5 is f511acb750076c56ad2d9647dcfe521d.
3. Run command python -c "from monai.transforms import LoadImage; loader = LoadImage(reader='pydicomreader'); loader('./SE000000.dcm');"
4. If I changed this line to class_name = description.SegmentDescription if hasattr(description, "SegmentDescription") else description.SegmentLabel, it works. However I am not sure if this modification is good enough.

Expected behavior
Read segmentation correctly.

[binliunls]

cc @SachidanandAlle , @tangy5 for reference.

[wyli]

it seems SegmentLabel is a required attribute and SegmentDescription is optional, perhaps the logic should be try SegmentLabel first

[KumoLiu]

Not sure whether SegmentLabel is unique here for frames otherwise we need to specify something like flabel_{i} here.