Illinois Tool Works Inc. (Glenview, IL) has acquired North Star Imaging (NSI) Inc. (Rogers, MN). The terms of the transaction were not disclosed. Prestwick Partners acted as the exclusive advisor to North Star Imaging.

NSI is a developer and manufacturer of nondestructive testing systems and software for industrial and research applications. NSI develops computed tomography and digital radiography imaging systems technologies. NSI’s systems are used in life sciences, military/defense, aerospace, security, research/education, industrial and electronics markets.

Illinois Tool Works Inc. brought in $13.9 billion in 2009. It is a multi-national manufacturer of industrial products and equipment. The company has more than 850 decentralized business units in 52 countries that employ approximately 60,000 men and women. NSI will join ITW’s Test and Measurement Group.

"NSI’s management team is delighted to be part of the ITW family and looks forward to the continued expansion of the services we offer to our customers working from the broad base that a company such as ITW offers," said General Manager Lawrence K. Swift. "From our business partner’s point of view, none of the day-to-day contact points within NSI will change and our relationship with all of you will remain unaffected by this change of ownership."