A method reconstructing at least one phase of a subject having a contrast agent in the subject at a selected start time, wherein the contrast agent in the subject has a x-ray scattering pattern different than that of an anatomy of the subject, comprising: powering an x-ray source to emit x-rays to be detected by a detector at a selected imaging start time; moving the x-ray source and the detector relative to the subject; and acquiring image data, by processing means, of a selected portion of the subject over time while moving the x-ray source and the detector, wherein the image data includes a plurality of image frames of the subject acquired over the time and at different positions relative to the subject based on the moving of the x-ray source and the detector; correlating each frame of the plurality of image frames over time to an injection time of the contrast agent in the subject for making a correlation of the plurality of image frames to the time since injection; selecting a first phase of the subject; determining a first phase sub-plurality of the plurality of image frames that relate to the first phase in the subject; and reconstructing, by the processing means, a model of the first phase of the subject based on the determined first phase sub-plurality of the plurality of image frames, wherein reconstructing a model of the first phase of the subject includes executing instructions with the processing means to determine a model of the first phase of the subject based on the determined first phase sub-plurality of the plurality of image frames, and wherein the correlated image frames are broken into the particular time frames that would relate to be selected phases; wherein the reconstructing of the model of the at least one phase of the subject includes: (a) selecting, or determining of, of a region of interest; (b) determining of phases in the region of interest; (c) provision to the processing means of frames of image data along with a related time relative to the injection of the contrast agent, wherein the related time is the correlated time of contrast injection of agent in the frames, and other parameters including the selected region to be reconstructed and a selected first phase in the region to be reconstructed; (d) the processing means reconstructing a model of the first phase of the subject by executing instructions to determine a model of the first phase of the subject based on the determined first phase sub-plurality of the plurality of image frames. powering an x-ray source to emit x-rays to be detected by a detector at a selected imaging start time; moving the x-ray source and the detector relative to the subject; and acquiring image data, by processing means, of a selected portion of the subject over time while moving the x-ray source and the detector, wherein the image data includes a plurality of image frames of the subject acquired over the time and at different positions relative to the subject based on the moving of the x-ray source and the detector; correlating each frame of the plurality of image frames over time to an injection time of the contrast agent in the subject for making a correlation of the plurality of image frames to the time since injection; selecting a first phase of the subject; determining a first phase sub-plurality of the plurality of image frames that relate to the first phase in the subject; and reconstructing, by the processing means, a model of the first phase of the subject based on the determined first phase sub-plurality of the plurality of image frames, wherein reconstructing a model of the first phase of the subject includes executing instructions with the processing means to determine a model of the first phase of the subject based on the determined first phase sub-plurality of the plurality of image frames, and wherein the correlated image frames are broken into the particular time frames that would relate to be selected phases; wherein the reconstructing of the model of the at least one phase of the subject includes: (a) selecting, or determining of, of a region of interest; (b) determining of phases in the region of interest; (c) provision to the processing means of frames of image data along with a related time relative to the injection of the contrast agent, wherein the related time is the correlated time of contrast injection of agent in the frames, and other parameters including the selected region to be reconstructed and a selected first phase in the region to be reconstructed; (d) the processing means reconstructing a model of the first phase of the subject by executing instructions to determine a model of the first phase of the subject based on the determined first phase sub-plurality of the plurality of image frames. (a) selecting, or determining of, of a region of interest; (b) determining of phases in the region of interest; (c) provision to the processing means of frames of image data along with a related time relative to the injection of the contrast agent, wherein the related time is the correlated time of contrast injection of agent in the frames, and other parameters including the selected region to be reconstructed and a selected first phase in the region to be reconstructed; (d) the processing means reconstructing a model of the first phase of the subject by executing instructions to determine a model of the first phase of the subject based on the determined first phase sub-plurality of the plurality of image frames.