Patent ID: 8768031

Claim:
A method of providing time dependent three dimensional imaging of a region of a patient comprising blood vessels in a perfusion bed, the method comprising: generating a time independent 3D volume reconstruction of the region based on a series of image projections of the region acquired over a wide range of projection angles; receiving a series of time resolved image projections of the region; and generating a time resolved series of limited sector 3D volume reconstructions of the region, wherein generating each limited sector 3D volume reconstruction in the series comprises: selecting a respective limited sector set of image projections from the series of time resolved image projections, the limited sector set of image projections including of projections in a limited range of projection angles less than the wide range of projection angles; and generating the limited sector 3D volume reconstruction based on the respective limited sector set of projections and constrained by the time independent 3D volume reconstruction.