init: tested on hangtuah to cloud

utils/dicom_utils.py

@@ -0,0 +1,86 @@
+"""
+General utility functions for DICOM operations.
+"""
+import os
+import json
+from datetime import datetime
+from utils.logger import main_logger as logger
+
+def create_directory_if_not_exists(directory_path):
+    """
+    Create directory if it doesn't exist.
+    
+    Args:
+        directory_path (str): Path to directory
+    """
+    if not os.path.exists(directory_path):
+        os.makedirs(directory_path, exist_ok=True)
+        logger.info(f"Created directory: {directory_path}")
+
+def save_json_data(data, filename, directory):
+    """
+    Save data as JSON to specified directory.
+    
+    Args:
+        data (dict): Data to save
+        filename (str): Filename without path
+        directory (str): Directory to save to
+        
+    Returns:
+        str: Full path to saved file
+    """
+    create_directory_if_not_exists(directory)
+    file_path = os.path.join(directory, filename)
+    
+    with open(file_path, 'w') as f:
+        json.dump(data, f, indent=2)
+    
+    logger.info(f"Saved JSON data to {file_path}")
+    return file_path
+
+def parse_dicom_date(date_str):
+    """
+    Parse DICOM date format (YYYYMMDD) to Python datetime.
+    
+    Args:
+        date_str (str): DICOM formatted date string
+        
+    Returns:
+        datetime: Python datetime object
+    """
+    if not date_str or len(date_str) != 8:
+        return None
+    
+    try:
+        return datetime.strptime(date_str, '%Y%m%d')
+    except ValueError:
+        logger.error(f"Invalid DICOM date format: {date_str}")
+        return None
+
+def parse_dicom_datetime(datetime_str):
+    """
+    Parse DICOM datetime format (YYYYMMDDHHMMSS) to Python datetime.
+    
+    Args:
+        datetime_str (str): DICOM formatted datetime string
+        
+    Returns:
+        datetime: Python datetime object
+    """
+    if not datetime_str:
+        return None
+    
+    # Handle various DICOM datetime formats
+    try:
+        if len(datetime_str) == 14:  # YYYYMMDDHHMMSS
+            return datetime.strptime(datetime_str, '%Y%m%d%H%M%S')
+        elif len(datetime_str) == 12:  # YYYYMMDDHHMM
+            return datetime.strptime(datetime_str, '%Y%m%d%H%M')
+        elif len(datetime_str) == 8:  # YYYYMMDD
+            return datetime.strptime(datetime_str, '%Y%m%d')
+        else:
+            logger.warning(f"Unexpected DICOM datetime format: {datetime_str}")
+            return None
+    except ValueError:
+        logger.error(f"Invalid DICOM datetime format: {datetime_str}")
+        return None