diff --git a/presidio-image-redactor/presidio_image_redactor/dicom_image_redactor_engine.py b/presidio-image-redactor/presidio_image_redactor/dicom_image_redactor_engine.py
index 89c6ea1a8..b3846762d 100644
--- a/presidio-image-redactor/presidio_image_redactor/dicom_image_redactor_engine.py
+++ b/presidio-image-redactor/presidio_image_redactor/dicom_image_redactor_engine.py
@@ -955,7 +955,7 @@ def _get_analyzer_results(
                 supported_entity="PERSON", deny_list=phi_list
             )
 
-            if type(ad_hoc_recognizers) is None:
+            if ad_hoc_recognizers is None:
                 ad_hoc_recognizers = [deny_list_recognizer]
             elif type(ad_hoc_recognizers) is list:
                 ad_hoc_recognizers.append(deny_list_recognizer)
diff --git a/presidio-image-redactor/tests/integration/resources/0_ORIGINAL_redacted.dcm b/presidio-image-redactor/tests/integration/resources/0_ORIGINAL_redacted.dcm
new file mode 100644
index 000000000..769549139
Binary files /dev/null and b/presidio-image-redactor/tests/integration/resources/0_ORIGINAL_redacted.dcm differ
diff --git a/presidio-image-redactor/tests/integration/test_dicom_image_redactor_engine_integration.py b/presidio-image-redactor/tests/integration/test_dicom_image_redactor_engine_integration.py
index 04ca53460..f76fe46a8 100644
--- a/presidio-image-redactor/tests/integration/test_dicom_image_redactor_engine_integration.py
+++ b/presidio-image-redactor/tests/integration/test_dicom_image_redactor_engine_integration.py
@@ -75,6 +75,20 @@ def test_redact_image_correctly(engine_builder: Callable, dcm_filepath: Path):
     )
 
 
+def test_compare_original_to_redacted():
+    """Test the redact_and_return_bbox function."""
+    input_path = Path(RESOURCES_PARENT_DIR, "0_ORIGINAL.dcm")
+    input_image = pydicom.dcmread(input_path)
+    redacted_path = Path(RESOURCES_PARENT_DIR, "0_ORIGINAL_redacted.dcm")
+    expected_redacted = pydicom.dcmread(redacted_path)
+    engine = DicomImageRedactorEngine()
+    actual_redacted, bboxes = engine.redact_and_return_bbox(
+        image=input_image,
+        use_metadata=True
+    )
+    assert np.array_equal(expected_redacted.pixel_array, actual_redacted.pixel_array)
+
+
 @pytest.mark.parametrize("engine_builder", all_engines_required())
 def test_redact_from_single_file_correctly(engine_builder: Callable):
     """Test the redact_from_file function with single file case.