Hologic DISCOVERY A, Техническое руководство

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Discovery QDR Series Technical Manual
1-9
Interface Board and the Distribution Board. Mathematical algorithms applied to this data
produce the scans seen by the operator and to calculate the BMD, BMC, and area of the
bone matter scanned.
Block Description
Computer Controls and commands all Discovery hardware modules.
PCI Communications
Controller Board Controls the flow of commands to and from the Scanner modules via the
communications bus.
Distribution Board Provides the interconnections between the Discovery Operator's Console and the
Scanner and distributes DC voltages.
Control Panel Provides switches for manually moving the C-Arm and Patient Table. Also
provides Emergency Stop and Instrument On/Off switches.
TX Stepper Motor
Driver Controls the motion of the Patient Table in and out motor and monitors table
position information from the encoder.
TY Stepper Motor
Driver Controls the motion of the Patient Table left to right motor and monitors table
position information from the encoder (A and W only).
TZ Stepper Motor
Driver Controls the motion of the Patient Table left and right pedestal motor and monitors
table position information from the string encoders (A and SL only).
AR Stepper Motor
Driver Controls the rotational motion of the C-Arm and monitors C-arm position
information from the encoder (A and SL only).
AY Stepper Motor
Driver Controls the motion of the C-Arm left and right motor and monitors C-Arm
position information from the encoder.
C-Arm Interface Controls the Aperture and Filter Drum motors, generates timing and control signals
for the X-Ray Controller and the Data Acquisition System, monitors the tape
switches, and provides power to the Positioning Laser.
X-Ray Controller Controls the operation of the X-ray Source.
X-Ray Source Unit Generates the X-ray beam.
Detector Board Converts the X-rays into electrical signals. Integrates the signals from the Solid
State Detectors and converts them to a digital value in the Analog-to-Digital
converter circuitry.
Control Panel Provides the operator with a means to reposition the table, C-Arm, and to turn on
the laser.
Positioning Laser Provides a laser crosshair beam to assist in positioning the patient on the Patient
Table.