Theory of Operation February 5, 2004 2-9
The DirectRay
Detector
The DirectRay Detector, illustrated in Figure 2-5, directly converts the X-rays to
digital data. The DirectRay Detector has several layers. The first layer inside the
cover, the SE-TFT detector matrix, converts the X-rays to digital data.
The DirectRay Detector also contains the control electronics and the precision
analog electronics that perform the data capture and conversion into digital
format. An 8-bit micro-controller in the DirectRay Detector performs the
management functions of setup, monitoring, and control of the acquisition
electronics.
Figure 2-5.
DirectRay Detector Structure
INTERNAL
DETECTOR
COVER
X-RAY
CONVERSION
LAYER
DETECTOR (TFT)
MATRIX
SUPPORT
STRUCTURE
READOUT
CHARGE
AMPLIFIERS
READOUT
GATE
DRIVERS
FRAME
IMAGE AREA
CARBON FIBER
COMPOSITE
COVER
ELECTRONICS HOUSING, CONTAINS:
A/D CONVERTORS
MULTIPLEXER
HIGH VOLTAGE POWER SUPPLY
DC-DC CONVERTER
ANTI-SCATTER
GRID MECHANISM
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