X-Ray would be difficult...
Steve, Having familiarity with portable x-ray equipment, I can tell you that this would not really be an effective solution for you. The safety concerns of x-ray equipment powerfull enough to penetrate small masses of stainless steel rigging, to the point of adequate exposure to detect anomolies would be an OSHA hazzard. You just wouldn't be able to legally do it without radiation permits and the red tape involved as it is highly controled. Fortunately, there is a better solution. Dye penetrant inspection would be a great indicator of a problem. There are also other non destructive methods that could be used that are safe and totally revealing of any problems. The aircraft industry has used them for years to inspect planes and there are independant labs that can do this for you if you're that concerned. I would just find a reputable rigger in your area and discuss your problem with him. A good surveyor would also be of help. Metalurgically speaking, it's unlikely you have metal damage of the crack variety as you would most certainly see melted metal first or at least some indications of high temperature. If that is the case, you probably also have some through hull or exit point damage as well and you need to haul the boat and look at that to.
