Siemens CR-IR 347, Руководство по обслуживанию, Страница: 16 / 123

CR-IR347 Service Manual PM - 12 009-058-03
08.30.2002 FM3476
PM - 12
2.2 Checking for Image Problems
■
Check for Nonuniformity, Sensitivity, and Density
(1) Expose two IPs of all sizes found at the institution (both ST and HR types). Expose the
first in the normal direction, and the second in a 180-degree rotated orientation.
The IP exposure conditions are as follows.
❍
ST
• Dose: 1 mR
• X-ray tube target : Tungsten
• Distance: 1.8 m
• Voltage: 80 kV
• Current: 50 mA
• Time: 0.013 sec
❍
HR
• Dose: 20 mR
• X-ray tube target/filter: Molybdenum/molybdenum
• Distance: 0.55 m
• Voltage: 28 kV
• Current: 100 mA
• Time: 0.053 sec
(2) Using the test menu, record and output an image.
❍
ST
“ ” (for Japanese version)/“SENSITIVITY” (for versions other than Japanese)
❍
HR
“ ” (for Japanese version)/“SensitivityHQ” (for U.S. version)/“SENSITIVITY2”
(for versions other than Japanese and U.S.)
(3) Check to ensure that there is no nonuniformity on the output film or the image on the
image monitor .
◆
CHECK
◆
Check for nonuniformity.
If any nonuniformity is found, refer to “10. Troubleshooting Procedures Based on
Abnormal Image” in the “Troubleshooting” volume.