OSI Systems Inc. on Wednesday reported a 67 percent growth in second quarter net income, despite a fall in revenues, due to lower charges and improved operating efficiencies.

Adjusted earnings came in above analysts’ estimates, although revenue fell short.

The Hawthorne security and medical scanning systems developer reported net income was $6.95 million (39 cents per share) for the quarter ended Dec. 31, compared to $4.16 million (24 cents) a year earlier. Revenues fell 5 percent to less than $151 million.

The results for the quarter included restructuring and other charges of $607,000, compared to $2.79 million in the prior-year period. Excluding items, earnings were $7.4 million.

Analysts surveyed by Thomson Reuters expected the company to report earnings of 37 cents per share on revenue of $167 million.

Revenues in the Security Group, which provides airport security scanning systems fell 12 percent to $59.1 million. Healthcare Group revenues fell 4 percent to $57.1 million.

At the end of the quarter, the company had an order backlog of $240 million, an 18 percent increase.

Looking ahead, OSI raised its fiscal year 2010 adjusted earnings to between $1.23 and $1.32 per share and maintained its revenue outlook of between $620 million and $640 million, with growth in security revenues expected in the second half of the year. Analysts are expecting per-share earnings of $1.21 on revenue of $625 million.

“With outstanding bookings and a record backlog, we are poised for significant sales and earnings growth in the second half of our fiscal year,” said Chief Executive Deepak Chopra in a press release.

Shares were down $1.17, or 4 percent, to $27.75 in midday trading on the Nasdaq.