[Slice sensitivity profile and image pixel noise of multi-slice spiral CT in comparison with single slice spiral CT].
OBJECTIVE
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.
Schorn
C
C
Abteilung für Röntgendiagnostik I, Georg-August-Universität Göttingen.
Obenauer
S
S
Funke
M
M
Hermann
K P
KP
Kopka
L
L
Grabbe
E
E
D016477:Artifacts; D004867:Equipment Design; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D012680:Sensitivity and Specificity; D013679:Technology, Radiologic / Q000295:instrumentation; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*