Med Tech Merger Bid

InSight Health Services Corp. said it received a sweetened verbal offer of $10 a share, or about $28.6 million, from Carlyle Group and Halifax Group to buy the shares of the diagnostic-imaging company they don’t already own. Newport Beach-based InSight, with revenue of $119 million in the year ended June 30, said the investor groups own about a third of InSight’s voting stock. The bid requires approval from General Electric Co., which owns 36% of the voting stock. GE spokesman Bruce Bunch declined to reveal the company’s position on the bid.

The offer represents a 51% premium to Insight’s closing price Monday of $6.63.

InSight stock rose $1.50 to close at $8.13 on the Nasdaq Small-Cap market.

InSight spokeswoman Lynne Rayburn declined to give the amount or date of the previous offer. Carlyle’s chairman is Frank Carlucci, a former U.S. secretary of Defense. Insight provides diagnostic imaging and information, treatment and related management services to hospitals and health-care companies.