A CTP uses helical imaging across the brain over time to image contrast entering and leaving the brain tissue. Our scanners uses a mode called Adaptive 4D Spiral to perform the CTP (see video across). The table will shuttle back and forth while imaging. 

As this technique uses serial brain CT's, the dose is high so it is important that the following occur:

• is only used when justified by radiology and neurology consultants 

• The patients head is tilted so the orbits are outside the scan FOV (see across)

• The patient is capable of holding still throughout entire scan (approx. 45 seconds)

The patients also require good PIVC access as high flow rates are used for the contrast injection. 

These images are sent to RAPID where the following measurements and maps are made automatically.

In the case of RAPID not working we can also create these maps on Syngo Via.