There are a number of different interpretations to the dream symbol of an X-Ray. Some of them would be literal and some of them would be metaphorical. The more details you can recall from your dream with the X-Ray symbol, the easier it will be to determine which interpretation makes the most sense for your situation. In the literal sense, an X-Ray appearing in your dream could be pointing you to a health situation that you need to have looked at. If there are other people in your dream, the health situation could refer to another person’s health situation.
If you have been having health problems and an X-Ray regarding that part of your life shows up in your dream, your subconscious is validating to you that you need to have this examined at a deeper level. If the symbol is appearing in your dream for reasons that are not obviously health related, the symbol represents the message that something is hidden in your life. In this case you want to pay very close attention to what is showing up on the X-Ray, and what other people are in your dream.
You may also get a very strong sense of a person in your dream, but not see them. If this occurs when you see an X-Ray in your dream, it is that person that is hiding something from you, and you will need to use some external resources to see the entire picture. If X-Ray vision is a part of your dream, then the message may be that superficial matters are playing a large role in your life right now, perhaps too much so. You may want to put on some X-Ray vision goggles in your waking life in order to understand people at a deeper level.