AGFA DR 800 User Manual page 139

Figure 119: Roadmapping workflow is started
WARNING:
The roadmapping image processing relies on absence of
movement. Do not change the position of the table, X-ray
tube or collimator during the roadmapping examination.
8. Press and hold down the fluoroscopy pedal to start the fluo sequence for
generating the roadmapping mask.
A first set of frames is used to compose a mask image. The subsequent
frames are displayed subtracted. The syringe icon indicates that the
contrast medium can be injected to create the roadmapping mask.
Figure 120: Icon indicating that injection of the contrast medium can start
9. Start injecting the contrast medium when the syringe icon is shown.
WARNING:
Roadmapping does not work with negative contrast media.
The blood vessels gradually fill with contrast medium and become visible
on the screen. If the option max opacity is enabled, the blood vessels stay
visible, even if the contrast medium has moved on.
10. Release the fluoroscopy pedal when the blood vessels are sufficiently filled
with contrast medium.
The roadmapping mask is stored and displayed as a thumbnail in the
lower half of the Image Overview pane.
Figure 121: Thumbnail of the roadmapping mask
11. Press and hold down the fluoroscopy pedal to start a roadmapping
exposure.
The previously acquired roadmapping mask is subtracted from the live
fluo sequence to visualize the blood vessels, as well as catheters or guide
wires that are moved through the vessels.
DR 800 | Basic Workflow | 139
0392C EN 20210309 1049