With the backdrop of a possible sale of the firm, Alliance Healthcare Services announced this week that it is acquiring four PET/CET imaging centers in several states.

The Irving, California-based healthcare giant’s radiology division recently reached an agreement on the purchase with Molecular Imaging Technologies, the two partners said Wednesday. Centers included in the deal operate in Maryland, Pennsylvania, Alabama and Louisiana.

“We feel fortunate to add four well-known and well-regarded PET/CT diagnostic imaging locations to the Alliance Radiology family,” President Rich Jones said in a statement. “Each site has an established reputation within its local community for providing patients with high-quality and high-value medical imaging, and each is located near where Alliance Radiology offers other imaging services.”

Corporate owners—Chinese financial firm Tahoe Investment Group—have reportedly considered selling Alliance, Bloomberg reported last month. A sale could fetch upward of $400 million, but THI may still opt to keep the business, according to the report.

AHS provides a range of services that include imaging joint ventures, help with center acquisitions, and outsourced radiology care. The company at one point was traded on the Nasdaq and also operates in oncology and pain management. Molecular Imaging Technologies, meanwhile, was founded in 1997 and typically partners with providers to create PET/CT programs, according to the announcement.

Company officials labeled Alliance as a “leading” provider of this imaging service in the U.S., claiming they employ the most technologists and PET/CT systems in the country. All told, the firm operates more than 600 diagnostic radiology, radiation therapy and interventional systems across 70 fixed-cite imaging locations and 40 cancer centers.