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the technology of the Nikon Metrology XT H 225 X- Ray CT system for clinical research. MicroCT refers to techniques for especially sharp images. “The new technology will impact research greatly, along with the alteration of clinical techniques. MicroCT tech- nology has been a part of dentistry for a few years,” said Gutmann, but with newer machines such as the XT H 225 “we can go to greater depths of anatomi- cal evaluation.” While not envisioning MicroCT for use directly on patients, “using it has opened our eyes and minds to a different way of looking at the environment where we work.”


The Benefits of CT Scanning In fact, Jesse


Garant, founder of Jesse Garant—Metrol- ogy Center (Windsor, ON, Canada) saw such an opportunity in CT-based metrology services that this has been the company’s primary offering since inception. “We have ten different industries that we work for right now but medical de- vice is one of our top four for our revenue for CT,” he said. Since CT metrology is still relatively new, he observed that medical device manufacturers new to the technique tend to start using it to diagnose failures. “They are looking to troubleshoot a device,


in pre-production,” he said. This includes product qualification such as first article inspection or prod- uct validation after testing such as for temperature, vibration testing, mechanical testing on prototypes and qualifying the internals of parts before produc- tion begins.


“CT is especially useful for clear molded parts, a common item in medical manufacturing. A vision system would have difficulty measuring some of those parts because they are often clear and reflec- tive,” he explained. Somewhat surprisingly, they use their own purpose-built CT machines all calibrated to NIST trace- able artifacts. “We started out years ago acquiring different systems, but we have since become quite tech-savvy and build or modify all of our in-house CT systems,” he said. “It gives us a lot more versatility on the systems than a standard off-the-shelf system you would buy because we are a service provider and we see thousands of different parts a year now. We want to pair the proper machine with the part coming in, to always give the client the best result.”


Starret Kinemetric Engineering Horizontal Digital Video Comparator


either in pre-production or in production for a given flaw that they’re experiencing,” Garant explained. They are looking for ‘hidden’ flaws due to the mate- rial, such as porosity or uneven wall thickness, or mechanical failure.


“Once they are educated on the value of CT, we can start to pull them into product qualification


MSS22 AdvancedManufacturing.org


High-Speed Inspection There are numer- ous places for metrol- ogy and inspection


in production as well as analysis and design. Zeiss Industrial Metrology (Maple Grove, MN), a provider of metrological CT systems with its Metrotom series, is also seeing the value of more tailored, purpose- built high-speed inspection systems built around CT. Their new offering is the VoluMax inline CT system. “VoluMax is something in-between non-destructive


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