Reconstruction of an image in medical imaging

An imaging modality comprising:

• a data processing device;
• and
• a control device,
• wherein the data processing device and control device are configured to:
• provide a first truncated projection image of an object that represents a region to be mapped of the object projected from a first projection source position into a first projection plane;
• provide a three-dimensional (3D) model specific to the object, wherein the 3D model comprises a modeled region to be mapped that corresponds to the region to be mapped of the object;
• generate a first supplementary forward projection of a first supplementation region of the 3D model, which extends beyond and adjoins the modeled region to be mapped, from the first projection source position into the first projection plane;
• and
• reconstruct the image based on the first truncated projection image and the first supplementary forward projection of the first supplementation region.

A non-transitory computer-readable medium comprising a computer program having commands that, on execution of the computer program by an imaging modality, cause the imaging modality to:

• provide a first truncated projection image of an object that represents a region to be mapped of the object projected from a first projection source position into a first projection plane;
• provide a three-dimensional (3D) model specific to the object, wherein the 3D model comprises a modeled region to be mapped that corresponds to the region to be mapped of the object;
• generate a first supplementary forward projection of a first supplementation region of the 3D model, which extends beyond and adjoins the modeled region to be mapped, from the first projection source position into the first projection plane;
• and
• reconstruct the image based on the first truncated projection image and the first supplementary forward projection of the first supplementation region.