Model-based reconstruction methods for CT perfusion imaging
M1.3 | Use of prior knowledge for interventional C-arm CT
A C-Arm CT system, as compared with CT systems, is more sensible to the scattered radiation. This acquired scattered radiation leads, unavoidably, to a degradation of the reconstructed object's quality.
The presence of metallic implants such as platinum coils or clips additionally impairs image qualities by causing beam-hardening and scattering effects.
Every bit of information - that we call 'prior knowledge' - possible to being safely introduced during the image reconstruction process or post-processing can help to improve image qualities, reduce the overall acquisition time, or reduce the dose acquired by the patient.
In this project, prior knowledge will thus be used in order to improve C-Arm CT images interferred by scattering artefacts due to the presence of metallic implants. Supplementary information about the shape of metallic implants or the patient him/herself (e.g. obtained using a preparative planning CT) will consequently allow for an improved artefact compensation as well as image fidelity in the vicinity of implants.