Positron Corp., a manufacturer of positron emission tomography (PET) scanners, announced it has sold its Positron mPower PET scanner to the Weatherhead PET Center for Preventing and Reversing Atherosclerosis at the University of Texas Medical School in Houston. . . . Lockheed Martin has received delivery of its first laser tracker alignment system from ATT Metrology Services, a precision measurement company based in Redmond, Wash. The new system will be used for boresight alignment on the latest model of F-16 aircraft. . . . Therma-Wave Inc., developer of process control metrology systems used in the manufacture of semiconductors, announced it has hired Yutaka Kisanuki as representative director and president of Therma-Wave's Japanese subsidiary and Ying Shiau as vice president and general manager of the company's Asia Pacific region.