Obtaining LONG RAW Data (Bytes) from EnterpriseLibrary

I have problem to get image bytes data from oracle. reader("image") always returning 0 length. Is their any workaround? If i used oledb then its working but not working with Microsoft EnterpriseLibrary.

using (IDataReader reader = ExecuteNonQueryOracle(Query)) 
    {
            while (reader.Read) {
                dict("image") = reader("image");
            }
    }
public object ExecuteNonQueryOracle(string Query)
{

        using (dbCommand == CurrentDatabase.GetSqlStringCommand(Query)) {
            dbCommand.CommandType = CommandType.Text;
            return CurrentDatabase.ExecuteReader(dbCommand);
        }

}