Related Experiment Videos
[Slice sensitivity profile and image pixel noise of multi-slice spiral CT in comparison with single slice spiral CT]
C Schorn1, S Obenauer, M Funke
1Abteilung für Röntgendiagnostik I, Georg-August-Universität Göttingen.
Purpose:
Presentation and evaluation of slice sensitivity profile and pixel noise of multi-slice CT in comparison to single-slice CT.
Methods:
Slice sensitivity profiles and pixel noise of a multi-slice CT equipped with a 2D matrix detector array and of a single-slice CT were evaluated in phantom studies.
Results:
For the single-slice CT the width of the slice sensitivity profiles increased with increasing pitch. In spite of a much higher table speed the slice sensitivity profiles of multi-slice CT were narrower and did not increase with higher pitch. Noise in single-slice CT was independent of pitch. For multi-slice CT noise increased with higher pitch and for the higher pitch decreased slightly with higher detector row collimation.
Conclusions:
Multi-slice CT provides superior z-resolution and higher volume coverage speed. These qualities fulfill one of the prerequisites for improvement of 3D postprocessing.