A system for reconstructing an image of an object, wherein the system comprises: a projection data providing unit for providing projection data of the object, which has been acquired by using an imaging unit comprising an imaging field of view, an estimated image data generation unit for generating estimated image data indicative of a part of the object located outside the imaging FOV based on the provided projection data, a virtual projection data estimation unit for estimating virtual projection data, wherein the virtual projection data is estimated by forward projecting the estimated image data based on virtual settings of a virtual imaging unit, wherein the virtual imaging unit comprises a virtual FOV, wherein the part of the object located outside the imaging FOV is located inside the virtual FOV, a data fusion unit for generating fused projection data based on a fusion of the provided projection data with the virtual projection data, and a final image data reconstruction unit for reconstructing a final image of the object based on the fused projection data; wherein the generating of estimated image data comprises reconstructing the provided projection data based on an algorithm suitable for reconstructing incomplete sampled projection data; wherein the reconstruction of the provided projection data is performed based on an iterative discrete tomography algorithm, the iterative discrete tomography algorithm being a DART algorithm or a TVR-DART algorithm; wherein in each iterative step of the DART algorithm or TVR-DART algorithm iterative image data is generated and a part of the iterative image data in a region corresponding to the imaging FOV or a region included in the imaging FOV is set to an image value of zero; or wherein in each iterative step of the DART algorithm an iterative image data is generated and a set of free pixels is determined in the iterative image data, wherein the set of free pixels is restricted to a region corresponding to a region outside the imaging FOV or to a region outside a region included in the imaging FOV. a projection data providing unit for providing projection data of the object, which has been acquired by using an imaging unit comprising an imaging field of view, an estimated image data generation unit for generating estimated image data indicative of a part of the object located outside the imaging FOV based on the provided projection data, a virtual projection data estimation unit for estimating virtual projection data, wherein the virtual projection data is estimated by forward projecting the estimated image data based on virtual settings of a virtual imaging unit, wherein the virtual imaging unit comprises a virtual FOV, wherein the part of the object located outside the imaging FOV is located inside the virtual FOV, a data fusion unit for generating fused projection data based on a fusion of the provided projection data with the virtual projection data, and a final image data reconstruction unit for reconstructing a final image of the object based on the fused projection data; wherein the generating of estimated image data comprises reconstructing the provided projection data based on an algorithm suitable for reconstructing incomplete sampled projection data; wherein the reconstruction of the provided projection data is performed based on an iterative discrete tomography algorithm, the iterative discrete tomography algorithm being a DART algorithm or a TVR-DART algorithm; wherein in each iterative step of the DART algorithm or TVR-DART algorithm iterative image data is generated and a part of the iterative image data in a region corresponding to the imaging FOV or a region included in the imaging FOV is set to an image value of zero; or wherein in each iterative step of the DART algorithm an iterative image data is generated and a set of free pixels is determined in the iterative image data, wherein the set of free pixels is restricted to a region corresponding to a region outside the imaging FOV or to a region outside a region included in the imaging FOV. wherein in each iterative step of the DART algorithm or TVR-DART algorithm iterative image data is generated and a part of the iterative image data in a region corresponding to the imaging FOV or a region included in the imaging FOV is set to an image value of zero; or wherein in each iterative step of the DART algorithm an iterative image data is generated and a set of free pixels is determined in the iterative image data, wherein the set of free pixels is restricted to a region corresponding to a region outside the imaging FOV or to a region outside a region included in the imaging FOV.