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syngo CT 2007E
Emotion Operator Manual
02/2008
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Information about Personal Safety
Safety
A.2-32
Measurement related artifacts
A.2
The most significant measurement related artifacts are the fol-
lowing:
A.2
❏
Partial volume effects
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Beam hardening
❏
Metal artifacts
❏
Motion artifacts
Partial volume effects
A.2
Thick slices are often preferred instead of thin slices. This helps
to increase signal to noise ratio and to limit the examination
time by reducing the number of slices. However, this may result
in partial volume effects. These are caused by high density tis-
sues (such as a bone) or objects (such as pacemakers) project-
ing only partly into the slice plane. One such well-known arti-
fact is the so-called Hounsfield bar between the petrous bones.
Other regions of the skull are also problematic with regard to
partial volume effects which are visible as dark streaks. Addi-
tional correction and / or special parameter settings (head
modes) help to minimize these effects.
A.2
✧
To avoid partial volume effects use thinner slices.
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 ...