Detector Sub System; Detector Overview; Detector Operation - GE Medical Systems PRODIGY Service Manual

2.11 Detector Sub System

2.11.1 Detector Overview

2.11.2 Detector Operation

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PRODIGY Service Manual (Rev C - 2000)
• 16 individual CZT (cadmium zinc telluride) crystals which convert X-ray
energy directly to electrical charge
• The charge pulse generated by the individual detectors is directly
proportional to the photon energy that generated the charge pulse (see
2.16.9 for spectrum information).
• The array of 16 CZT crystals each act as pixel detectors, from which the
data is combined to form the densitometry data set.
• The Detector electronics amplify, discriminate and counts x-rays for all 16
detector elements.
• The detector communicates with the SBC.
• The Detector has 5 PCB associated with it, the Detector Mother Board
(DMB) and 4 identical Detector Daughter Boards (DDB's).
• The detector has its own dedicated High Voltage Power Supply, used for
supplying detector bias.
Figure 2-15. Detector Block Diagram
System Overview 2-69