Imaging systems and methods

An imaging system, comprising:

• at least one storage device including a set of instructions;
• and
• at least one processor in communication with the at least one storage device, wherein when executing the set of instructions, the at least one processor is directed to cause the system to perform operations including:
• obtaining, from a storage medium, a data set including a spatial basis and one or more temporal bases, the spatial basis and the one or more temporal bases corresponding to a plurality of time-series images of a region of interest (ROI) of an object, the spatial basis including spatial information of the plurality of time-series images, and the one or more temporal bases including temporal information of the plurality of time-series images;
• receiving an instruction of reconstructing one or more target images of the plurality of time-series images;
• reconstructing the one or more target images based on the data set and the instruction, wherein each of the one or more target images is reconstructed by
• determining a temporal basis sub-set of each of the one or more temporal bases based on the instruction;
• and
• reconstructing the target image based on the data set and the one or more temporal basis sub-sets;
• and
• displaying the one or more target images.

An imaging method implemented on a machine including one or more processors and one or more storage devices, comprising:

• obtaining imaging data associated with a region of interest (ROI) of an object, the imaging data corresponding to a plurality of time-series images of the ROI;
• determining, based on the imaging data, a data set including a spatial basis and one or more temporal bases, the spatial basis including spatial information of the imaging data, the one or more temporal bases including temporal information of the imaging data;
• and
• storing, in a storage medium, the spatial basis and the one or more temporal bases.