Kohlberg-backed US Radiology Specialists, one of the premier physician-owned radiology groups in the US, agreed to acquire Radiology, the largest private practice radiology group and outpatient imaging operator in Tucson, Arizona. Financial terms were not disclosed. "We're excited to partner with Radiology Ltd. and welcome them to US Radiology. Their team of highly-accomplished and nationally-respected radiologists have delivered top-quality, patient-centric radiology services for over 80 years. This partnership embodies our vision to partner with the best radiology groups in the nation," John Perkins, US Radiology CEO.