Alpha Source Inc., an early stage biomedical company based in Westwood, raised $41 million from investors, according to an Oct. 24 securities filing.

The developer of radioisotopes – chemical substances that can be used in radiology treatments – also does business as Alpha Isotopes. It raised the funds in a seed round from 11 investors, according to the filing with the U.S. Securities and Exchange Commission.

Alpha Source launched as a limited liability corporation in 2007 and was incorporated two years ago, according to the California secretary of state.

It is now led by Howard Lewin, a cardiologist affiliated with Cedars-Sinai Medical Center and Ronald Reagan UCLA Medical Center.

The company has patented a new technology to create a range of radioisotopes to be used in medicine, Lewin said on his LinkedIn page.

Alpha Source can, in some cases, make them at less cost than those currently being produced, he said. It also aims to create new radioisotopes that were once too costly to make in hopes of expanding the market and helping to develop radiopharmaceuticals for personalized cancer therapies.