Ionpath Inc., a developer of high-definition spatial proteomics, scored $18 million in a series B funding round led by Samsara Biocapital. The round also included global mass spectrometry leader Bruker Corp. as a new investor. Menlo Park, Calif.-based Ionpath plans to use the investment for continued development and deployment of the company’s Multiplexed Ion Beam Imaging (MIBI) technology, which provides quantitative protein imaging at a subcellular level.