Perceptive Informatics and Optasia Medical Inc. signed an imaging measurement deal for studies of osteoarthritis in knees.

The agreement calls for Cambridge, Mass.-based Perceptive, which is the clinical trial data management arm of Parexel International Corp., to use Sudbury, Mass.-based Optasia’s KneeAnalyzer software to enhance image analysis of the knee in osteoarthritis patients.

Parexel posted $6.2 million in net income on $292 million in sales for the fourth quarter, compared to $25 million on $332 million in sales for the same period last year. For the full year, the company reported $39 million in profits on $1.2 billion in sales, compared to $65 million on $1.1 billion in sales last year.