** Medical device maker's shares ARAY.O up 3.5% at $3.8
** ARAY announced positive data from a two-year follow-up
study of CyberKnife, its FDA-approved robotic platform for
radiotherapy on various types of cancers
** Co says prostate cancer patients who were treated by
CyberKnife experienced side effects in their bladder half as
much as patients who were treated with conventional radiotherapy
devices
** Follow-up study was conducted at 37 sites in the UK,
Canada and Ireland
** Stock down ~12% this year, as of Monday's close
(Reporting by Ruhi Soni in Bengaluru;)
((Ruhi.Soni@thomsonreuters.com;))