diff --git a/monai/data/image_reader.py b/monai/data/image_reader.py
index 76bf1817dc..16e8514f48 100644
--- a/monai/data/image_reader.py
+++ b/monai/data/image_reader.py
@@ -643,11 +643,13 @@ def __init__(self, reader_lib: str = "cuClaraImage"):
         super().__init__()
         self.reader_lib = reader_lib.lower()
         if self.reader_lib == "openslide":
-            self.wsi_reader = openslide.OpenSlide
-            print("> OpenSlide is being used.")
+            if has_osl:
+                self.wsi_reader = openslide.OpenSlide
+                print("> OpenSlide is being used.")
         elif self.reader_lib == "cuclaraimage":
-            self.wsi_reader = cuimage.CuImage
-            print("> CuImage is being used.")
+            if has_cux:
+                self.wsi_reader = cuimage.CuImage
+                print("> CuImage is being used.")
         else:
             raise ValueError('`reader_lib` should be either "cuClaraImage" or "OpenSlide"')
 
diff --git a/monai/transforms/io/array.py b/monai/transforms/io/array.py
index de9a8800a2..002bfd8242 100644
--- a/monai/transforms/io/array.py
+++ b/monai/transforms/io/array.py
@@ -19,7 +19,7 @@
 import torch
 
 from monai.config import DtypeLike
-from monai.data.image_reader import ImageReader, ITKReader, NibabelReader, NumpyReader, PILReader
+from monai.data.image_reader import ImageReader, ITKReader, NibabelReader, NumpyReader, PILReader, WSIReader
 from monai.data.nifti_saver import NiftiSaver
 from monai.data.png_saver import PNGSaver
 from monai.transforms.transform import Transform
@@ -78,7 +78,7 @@ def __init__(
             reader: register reader to load image file and meta data, if None, still can register readers
                 at runtime or use the default readers. If a string of reader name provided, will construct
                 a reader object with the `*args` and `**kwargs` parameters, supported reader name: "NibabelReader",
-                "PILReader", "ITKReader", "NumpyReader"
+                "PILReader", "ITKReader", "NumpyReader", "WSIReader".
             image_only: if True return only the image volume, otherwise return image data array and header dict.
             dtype: if not None convert the loaded image to this data type.
             args: additional parameters for reader if providing a reader name.
@@ -90,7 +90,7 @@ def __init__(
 
         """
         # set predefined readers as default
-        self.readers: List[ImageReader] = [ITKReader(), NumpyReader(), PILReader(), NibabelReader()]
+        self.readers: List[ImageReader] = [ITKReader(), NumpyReader(), PILReader(), NibabelReader(), WSIReader()]
         if reader is not None:
             if isinstance(reader, str):
                 supported_readers = {
@@ -98,6 +98,7 @@ def __init__(
                     "pilreader": PILReader,
                     "itkreader": ITKReader,
                     "numpyreader": NumpyReader,
+                    "wsireader": WSIReader,
                 }
                 reader = reader.lower()
                 if reader not in supported_readers:
diff --git a/monai/transforms/io/dictionary.py b/monai/transforms/io/dictionary.py
index 50ab8f9868..7f663ea303 100644
--- a/monai/transforms/io/dictionary.py
+++ b/monai/transforms/io/dictionary.py
@@ -71,7 +71,7 @@ def __init__(
             reader: register reader to load image file and meta data, if None, still can register readers
                 at runtime or use the default readers. If a string of reader name provided, will construct
                 a reader object with the `*args` and `**kwargs` parameters, supported reader name: "NibabelReader",
-                "PILReader", "ITKReader", "NumpyReader"
+                "PILReader", "ITKReader", "NumpyReader", "WSIReader".
             dtype: if not None convert the loaded image data to this data type.
             meta_key_postfix: use `key_{postfix}` to store the metadata of the nifti image,
                 default is `meta_dict`. The meta data is a dictionary object.