PET/MR Image co-registration is not correct.

Wrong co-registration calibration.

Verify the co-registration using the co-registration phantom and recalibrate if necessary.

The acquisition fails to start.

A software service could have stopped, an important component is not power up or there is an Ethernet communication issue

The reconstruction does not start automatically after acquisition.

The ICONREconstructorService has stopped on the PET RECO Server

Verify this by checking the Windows Task Manager if necessary execute this program by hand (see folder Reconstructor)

The reconstructed PET image looks grainy or noisy.

The iteration number could be too high for the statistics of the acquisition.

Reduce the number of iterations and if possible enlarge the voxel size.

The image values are unexpectedly high.

The wrong reference time for the decay correction can multiply the image by a large factor.

Check the dose calibration time and make sure it is correct.

Image artifact along the transversal direction. A bright band goes across the image followed by a dimmed band.

The lack of attenuation information in some parts of the subject might lead to this kind of artefacts.

Make sure that the attenuation map used covers the full length of your PET image.

PET Image Uniformity is not uniform.

Wrong Normalization Calibration.

Recalibrate the PET normalization factors.

PET Image Artifacts

One PET Detector is not working properly.

Use the diagnosis tool PETGlobalStatus with the list-mode file acquired. If the report has some red flags, contact Bruker Service