diff --git a/src/aiunn/finetune.py b/src/aiunn/finetune.py
index ce1b07a..7af2695 100644
--- a/src/aiunn/finetune.py
+++ b/src/aiunn/finetune.py
@@ -8,6 +8,8 @@ import torchvision.transforms as transforms
 from aiia.model import AIIABase, AIIA
 from sklearn.model_selection import train_test_split
 from typing import Dict, List, Union, Optional
+import base64
+
 
 class ImageDataset(Dataset):
     def __init__(self, dataframe, transform=None):
@@ -20,23 +22,30 @@ class ImageDataset(Dataset):
     def __getitem__(self, idx):
         row = self.dataframe.iloc[idx]
 
-        # Decode image_512 from bytes
-        img_bytes = row['image_512']
-        img_stream = io.BytesIO(img_bytes)
-        low_res_image = Image.open(img_stream).convert('RGB')
+        # Convert string to bytes and handle decoding
+        try:
+            # Decode base64 string to bytes
+            low_res_bytes = base64.b64decode(row['image_512'])
+            high_res_bytes = base64.b64decode(row['image_1024'])
+        except Exception as e:
+            raise ValueError(f"Error decoding base64 string: {str(e)}")
 
-        # Decode image_1024 from bytes
-        high_res_bytes = row['image_1024']
-        high_stream = io.BytesIO(high_res_bytes)
-        high_res_image = Image.open(high_stream).convert('RGB')
+        # Create image streams
+        low_res_stream = io.BytesIO(low_res_bytes)
+        high_res_stream = io.BytesIO(high_res_bytes)
 
-        # Apply transformations if specified
+        # Open images
+        low_res_image = Image.open(low_res_stream).convert('RGB')
+        high_res_image = Image.open(high_res_stream).convert('RGB')
+
+        # Apply transformations
         if self.transform:
             low_res_image = self.transform(low_res_image)
             high_res_image = self.transform(high_res_image)
 
         return {'low_ress': low_res_image, 'high_ress': high_res_image}
 
+
 class ModelTrainer:
     def __init__(self,
                  model: AIIA,