Siemens syngo CT 2005C - Manual (Page 49)

Workflow Information
49
– Move the monitoring scan line towards the optimal
position and release the mouse button, it will be
snapped automatically. (Trick: if you move the mon-
itoring scan line away from the optimal position the
“snapping” mechanism will be inactive).
• Place a ROI in the premonitoring scan on the target
area or vessel used for triggering with one left
mouse click. (The ROI is defined with double circles
– the outer circle is used for easy positioning, and
the inner circle is used for the actual evaluation). You
can also zoom the reference image for easier posi-
tioning of the ROI.
• Set the appropriate trigger threshold, and start con-
trast injection and monitoring scans at the same
time.
During the monitoring scans, there will be simulta-
neous display of the relative enhancement of the tar-
get ROI. When the predefined density is reached, the
spiral acquisition will be triggered automatically.
• You can also initiate the spiral any time during the
monitoring phase manually – either by pressing the
START button or by left mouse clicking the START
radio button. If you do not want to use automatic
triggering, you can set your trigger threshold num-
ber extremely high so that it will not trigger auto-
matically, and you can start the spiral when you
desire.
C2-025.630.01.01.02_APPLICATIONGUIDE_SPIRIT.book Page 49 Friday, April 8, 2005 9:55 AM