Thermoelectrically controlled X-ray detector array statement regarding federally sponsored research

A method for maintaining a temperature profile along an array detector array in a substantially isothermal and thermally stable condition during CT scanning operations, the method comprising:

• coupling a thermoelectric cooler to each end of the x-ray detector array;
• selecting an operating temperature for operating the detector array;
• sensing an actual temperature of the detector array at each of a center portion and a first end or second end of the detector array;
• providing a heater to control the temperature of the center position of the array;
• and
• comparing the selected operating temperature and the actual sensed temperature, and commanding the thermoelectric cooler to heat or cool the x-ray detector array and the heater top heat the center portion of the array based on the difference between the selected operating and sensed temperatures, wherein a temperature profile along a length of the detector is maintained.

A detector assembly for use in a computed tomography scanner, the detector assembly comprising:

• a detector array;
• first and second rails, the first and second rails disposed on opposing sides of the detector array, each of the first and second rails including a conductive insert for conducting heat along the length of the detector array;
• a thermoelectric cooler coupled to a distal end of each of the first and second rails, the thermoelectric cooler including a positive and a negative power lead for receiving a power supply;
• a passive heat dissipating device coupled to the thermoelectric cooler;
• a plurality of temperature sensors coupled at spaced intervals along the detector array;
• a heater directed at a center portion of the detector array;
• and
• a controller device, the controller device being electrically coupled to the thermoelectric cooler, the heater, and to the plurality of temperature sensors, wherein the controller device receives a plurality of signals indicative of a temperature of the detector array from each of the temperature sensors, compares the received signals to a corresponding plurality of selected set point temperatures, and supplies a drive signal to each of the thermoelectric coolers and the heater to maintain the array at the selected temperature.