1. Development and Implementation of the ClearPEM-Sonic Detector Control System Gonçalo Nuno Bento Duarte da Silva Supervisor: Prof. João Manuel Coelho dos Santos Varela Co-Supervisor: Prof. Maria Helena da Costa Matos Sarmento Instituto Superior Técnico – September 10, 2010 bento@lip.pt

3. ClearPEM Detector Control System

4. ClearPEM-Sonic Detector Control System

5. Service Boards Calibration

7. Patient injected with a radiotracer. ClearPEM ClearPEM-Sonic

8. Scanner’s Hardware 4 ISEG

10. 2 APD arrays

11. 1 Crystal array

12. 2 Frontend Electronic Boards (FEBs)

13. 2 ASICs

15. Provide 32 threshold voltages (Vth).

16. Provide 32 HVs to bias the APDs.

18. To develop the ClearPEM-Sonic Detector Control System.

20. Control and monitor the ClearPEM hardware.

21. Power supplies

22. Service Boards

23. Data Acquisition ElectronicsState Machine

25. GPIB (SCPI)

26. Set output

27. Voltages & Currents

28. ISEG HV power supplies

29. CAN bus (C++ DLL)

30. Set output

31. Voltages & Currents

32. Service Boards

33. I2C

34. Vth and HV regulation DACs

35. Pressure

40. Super Modules temperature monitoring deactivated.

41. Two I2C temperature sensors added.

42. New temperature monitoring.

44. Stopping LabVIEW

45. LabVIEW crashing System back ON

46. Computer crashing

47. Current state saved in a text file.

48. File read in the DCS initialization.

50. Lost of communication

51. Robustness tests

52. Error simulator software

53. Wrong voltages, internal status and temperatures.

54. Improvements implemented on the ClearPEM at IPO-Porto.

56. Main functions:

57. Power supplies control and monitoring

58. Data Acquisition Electronics control and monitoring

59. Service Board control and monitoring

62. To monitor the water temperature.

63. To monitor the internal status of the chiller.

64. To setup the upper and lower limits of temperature.

65. To detect communication failure.

67. To set and measure the 64 threshold voltages.

68. To set and measure the 64 voltages of the HV regulation DACs.

69. To monitor the 16 temperature sensors.

70. To monitor the humidity and the dew point.

72. HV values control

73. Vth values control

74. FEB temperature monitoring

77. DCS was proven to be stable, working without crashing or stop responding for 12 hours test runs.

78. Error simulator software

79. Wrong voltages, internal statuses and temperatures

81. DACs Linear Behavior

82. Best-fit line method

83. Calibration software

84. 9 s per channel

86. Linear behavior

87. Best-fit line method

88. Calibration software

89. 120 s per channel.

91. 64 PT100 temperature probes

92. High precision resistors

93. 0.1%

94. Linear behavior

95. Best-fit line method

97. ISEG HV power supplies.

98. Kepco LV power supplies.

99. Service Boards.

100. Error handling.

101. The ClearPEM is currently being used in trials at Coimbra.

102. ClearPEM-Sonic DCS development

103. Added new state to the State Machine.

104. Development of the Chiller control and new SB control.

105. Robustness and functionality tests.

106. User Manual.

108. Vth, HV regulation circuits and Super Modules temperature monitoring.

109. Linear Behavior -> Best-fit line method.

110. 3 dedicated calibration softwares.

112. Backup Slides

113. ClearPEM 29 Experimental results 2.0 mm 1.5 mm 2.5 mm 3.0 mm 1.2 mm High resolution MicroDerenzo phantom 3D rendered reconstructed image