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Quality Assurance
Low Contrast Test (Optional)
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syngo CT 2007E
Emotion Operator Manual
02/2008
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F.5-13
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Evaluating the test
F.5
Normally one scan is sufficient to discern the pins in the row
with the smallest diameter (3 mm). However, the procedure
may be repeated if desired. Low contrast measurements are
directly effected by the level of noise (“sigma”) in the CT system,
which may vary from scan to scan within a specified range. Low
contrast estimations involve visual verification methods that
are somewhat subjective. It is normal to expect some variations
in assessing low contrast of the smallest (3 mm) pins.
F.5
✧
Adjust the window width and center to improve visualiza-
tion (adequate starting values: 40 width / 90 center).
✧
Observe the region where the small pins are located just
below the two 20 mm measurement areas.
i
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F
It may help to observe the image in a semi-darkened room and
from distance of up to 5 feet.
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The low contrast test is in tolerance if the resolution is at least
5.0 mm.
F.5
f B
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F
Test is out of tolerance.
F.5
✧
Contact Siemens Customer Service.
F.5
Содержание SOMATOM Emotion syngo CT 2007E
Страница 4: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 ii ...
Страница 8: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 vi ...
Страница 44: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 General Safety Information Safety A 1 22 ...
Страница 59: ...Safety Information about Personal Safety 0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 A 2 150 0 A 2 ...
Страница 172: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Software Related Safety Information Safety A 4 78 ...
Страница 198: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Scan Unit Gantry System Description B 2 16 ...
Страница 240: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Console System Description B 5 24 ...
Страница 246: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Storage Media and Drives System Description B 6 6 ...
Страница 264: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 System Handling C 2 ...
Страница 268: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Operation of the Gantry System Handling C 1 4 ...
Страница 302: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Use of Accessories System Handling C 4 14 ...
Страница 334: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Switching the System On and Off Operation D 1 30 ...
Страница 340: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Function Tests Operation D 2 6 ...
Страница 426: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Maintenance E 2 ...
Страница 442: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Quality Assurance F 2 ...
Страница 450: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 General Information Quality Assurance F 1 8 ...
Страница 460: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Daily Quality Measurements Quality Assurance F 2 10 ...
Страница 520: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Low Contrast Test Optional Quality Assurance F 5 14 ...
Страница 526: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Camera Test Quality Assurance F 6 6 ...
Страница 536: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Technical Specifications G 2 ...
Страница 538: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Standards and Statutory Regulations H 2 ...
Страница 540: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Release Information J 2 ...
Страница 542: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Safety Instructions K 2 ...
Страница 544: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Forms L 2 ...
Страница 546: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 DIP Report M 2 ...
Страница 548: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Location of labels N 2 ...
Страница 566: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Glossary O 18 ...
Страница 574: ...0 0 syngo CT 2007E Emotion Operator Manual 02 2008 0 0 Index P 8 ...