Operating instructions

Bolus Tracking

• After the Topogram is performed, the predefined

spiral scanning range and the optimal monitoring

position will be shown.

• If you need to redefine the spiral scanning range,

you should also reposition the monitoring scan in

order to keep the shortest start delay time (2 s).

(The distance between the beginning of the spiral

scanning range and the monitoring scan will be

the same).

• Move the monitoring scan line towards the opti-

mal position and release the mouse button, it will

be snapped automatically. (Trick: if you move the

monitoring scan line away from the optimal posi-

tion the “snapping” mechanism will be inactive).

4. Place an 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

positioning of the ROI.

5. Set the appropriate trigger threshold, and start

contrast injection and monitoring scans at the same

time.

During the monitoring scans, there will be simul-

taneous display of the relative enhancement of the

target ROI. When the predefined density is reached,

the spiral acquisition will be triggered automatically.

6. 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 number

extremely high so that it will not trigger automa-

tically, and you can start the spiral when you desire.