Check if image column is empty

DECLARE @Img varchar(50)
SET @Img = (SELECT ImageName FROM MyTable WHERE Id=1)

IF @Img IS NULL
    BEGIN
        PRINT 'Image is NULL'
    END
ELSE IF LEN(@Img) < 0
    BEGIN
        PRINT 'Image is blank'
    END
ELSE
    BEGIN
        PRINT 'Image is available = ' + @Img
    END

Declare int column_length;
declare curs cursor for select Length(image) from user_table where user_name ="XXX";

open curs
fetch curs into column_length
close curs