9
General
Scan Set Up
Scans can be simply set up by selecting a predefined
examination protocol. To repeat any mode, just click
the chronicle with the right mouse button for “repeat”.
To delete it, select “cut“. Each chronicle is rewriteable
before “load“.
Multiple ranges can be run either automatically with
“auto range“, or separately with a “pause” in between.
Scan and Reconstruction
Slice Collimation and Slice Width
Slice collimation is the slice thickness collimated by the
tube collimator, which determines the Z-coverage per
rotation. In multislice CT, this is divided by the number
of active detector channels (e. g. 16 x 0.75 mm).
Slice width is the true thickness of the reconstructed
image.
With the SOMATOM Sensation 16, you select the slice
collimation together with the slice width desired, the
slice width is independent of pitch and algorithm, i. e.
what you select is always what you get. Actually, you
do not need to care about the algorithm any more; the
software does it for you.
On the SOMATOM Sensation 16 some slice widths
are marked as “fast” (blue background). These images
will be reconstructed with highest performance (up
to 6-10 images per second). All others will be recon-
structed with up to 3 images per second.
The reconstruction time depends on slice collimation
and the reconstructed slice width. To get the fast
performance, slice width has to be at least 3 times the
slice collimation.
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