Virtual Radiologic is seeking to raise $82.8 million from its stock debut next week, according to documents filed with the U.S. Securities and Exchange Commission.

The Minnetonka, Minn.-based Virtual Radiologic said it believes that the initial public offering (IPO) will fetch $18 a share for the company's 4.6 million shares.

The stock began trading Thursday on the Nasdaq Stock Market, according to the company.