1.   A thermal imager uses detectors of cadmium mercury telluride, which detect infrared radiation when they are cooled to very low temperatures.

2.   They also perform surgery, detect radiation and play records.

3.   ...a sensitive piece of equipment used to detect radiation.

4.   And Walsh wonders what would have happened if the Soviets had detected the radiation and assumed that the United States was using nuclear weapons.

5.   Conventional radar tracks storms by detecting microwave radiation reflected by precipitation.

6.   Crews carried Geiger counters but detected no radiation.

7.   In fact, Spinrad said, the team was using the Keck telescope to observe a much closer galaxy when they detected faint radiation coming from an object nearby.

8.   Officials at the lab said no buildings containing radioactive materials had been damaged and that their sensors had detected no radiation leaks.

9.   The only serious problem, engineers said, is that the instrument for detecting radiation on and around Mars stopped communicating and had to be turned off last August.

10.   They detect intense radiation coming from the galactic center.