Carlsbad-based Alphatec has agreed to acquire EOS Imaging in a $121.9 million deal.

The transaction – built on cash and equity – spells out an $88 million acquisition price and calls for retiring $33.9 million of EOS Imaging’s debt.

Alphatec specializes in spine surgery. CEO Pat Miles said the company plans to fold in EOS Imaging’s imaging and modeling technology. This will improve Alphatec’s diagnosis of spine issues, surgery itself and post-operative assessments, the company said.

“This is a monumental transaction for [Alphatec],” Miles said in a news release.

EOS will immediately boost revenues, Alphatec said, noting EOS systems have been installed in more than 30 countries, generating 1 million patient exams annually.

Stockholders must still approve the deal, which has received approval from both companies’ boards. It’s expected to close in the third quarter.

EOS is headquartered in Paris, France.