Medical retinal imaging technology developer Optos reported strong figures for the three months to December 2009. Usage of its retinal imaging machines is rising. The average monthly site usage increased from 96 in the first quarter of the last financial year to 105 in the latest quarter. There was a 5% increase in average monthly pay-per-patient revenues from $1,987 to $2,092. Even so, the installed base is 200 lower than one year ago. That is why total pay-per-patient revenues for the quarter were flat at $22.7m. The operations generated $9m of cash in the quarter. Net debt has been cut from $46.2m to around $40m. Shares in QinetiQ Group continue to fall after Goldman Sachs cut its recommendation to neutral from buy. Defence technology developer QinetiQ warned last week that delayed orders mean that the second half of the year to March 2010 will not be seasonally stronger than the first as is normally the case.FTSE TechMARK - RisersOptos (OPTS) 109.00p +10.66%Dialight (DIA) 275.00p +7.84%DRS Data (DRS) 12.00p +4.35%Oxford Instruments (OXIG) 225.00p +4.29%Renovo Group (RNVO) 29.50p +3.51%Triad Group (TRD) 32.50p +3.08%Gresham Computing (GHT) 25.25p +3.06%BATM Advanced (BVC) 54.75p +2.34%Axis-Shield (ASD) 415.00p +2.15%Oxford Biomedica (OXB) 12.00p +2.13%FTSE TechMARK - FallersAlterian (ALN) 147.00p -5.92%AEA Technology (AAT) 25.00p -4.76%Phoenix IT Group (PNX) 263.00p -4.36%Asterand (ATD) 17.50p -4.11%Alphameric (ALM) 25.50p -3.77%QinetiQ Group (QQ.) 136.70p -3.73%Skyepharma (SKP) 92.50p -3.65%Intec Telecom Systems (ITL) 116.25p -3.13%Sepura (SEPU) 42.00p -2.89%Antisoma (ASM) 34.50p -2.82%