Archive OEC UroView 2800, Руководство пользователя

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X-Ray & ABS
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Service Periodic Maintenance Contents Schematics Illustrated Parts Installation
Auto Fluoro Mode
The Auto Fluoro Mode button on the X-Ray Control Console enables Automatic Brightness Stabilization (ABS) control of the kVp,
mA, and camera gain technique. When the Auto Fluoro Mode button is pressed, the button code is sensed by the X-Ray
Console Switch Matrix. The code is sent to the console X-Ray Control Interface PCB and is delivered to the X-Ray Control
Console CPU card plugged into the X-Ray Control Console backplane.
The output control command from the CPU card via the X-Ray Control Interface PCB is then sent via ARCnet to the CPU of the
Table/Generator Interface Card. While the system is in Auto Fluoro, kV, mA, and Camera gain are automatically adjusted by the
CPU using the standard ABS tables provided by software.
The technique when entering Auto Fluoro (from Manual Fluoro) is selected from the standard ABS table by matching the closest
kVp value to the last Manual setting for kVp.
The system adjusts the technique as necessary so as not to exceed a 20 R/minute dose maximum for all continuous HLF X-rays.
The system also adjusts the technique as necessary so as not to exceed a 10 R/minute dose maximum for all continuous non-HLF
X-rays.
All non-film X-rays begin with non-HLF, continuous X-ray generation. If, on the 3rd frame after X-rays have begun, the image is
stable, the software begins the requested X-ray type: HLF, Pulse Fluoro, Digital Cine or Continuous Fluoro.
If, on the 3rd frame, the image is NOT stable, the software begins an ABS servo with non-HLF, continuous X-ray generation until
Video Stable is achieved. Video Stable is achieved when the image value is within the tolerance value (Video Stable Window) of
the Video Stable as set by Utility Suite software.
Auto Brightness Stabilization Control (ABS)
The Auto Brightness Stabilization (ABS) automatically adjusts kVp, mA, and Camera Gain for an optimal image by comparing the
video level from the camera to a reference level contained in the video level index. The standard functions adjusted are
dependent on the Fluoro mode selected and are shown in the following tables: