Mednax Inc. said Tuesday it agreed to buy Virtual Radiologic Corp. (vRad) in a deal valued at $500 million. The seller was Providence Equity Partners. Eden Prairie, Minnesota-basd vRad is radiology physician services and telemedicine company. vRad’s current management team will remain with the company as part of Mednax. Credit Suisse provided financial advice to vRad while Kirkland & Ellis LLP was their law firm. McDermott, Will & Emery acted as legal advisor to Mednax.