System and method for PET correction

1. A method implemented on a computing device having at least one processor, at least one computer-readable storage medium, and a communication port connected to an imaging device including a detector, the detector including detector blocks, each detector block including at least one detecting element, the method comprising:

obtaining first scanning data relating to a first subject acquired by an imaging device;

obtaining second scanning data relating to a second subject acquired by the imaging device, wherein the second subject is different from the first subject;

determining whether the imaging device needs to be corrected by a process including:

determining, based on the first scanning data, whether the imaging device satisfies a first condition; and

determining, based on the second scanning data, whether the imaging device satisfies a second condition;

in response to determining that the imaging device needs to be corrected, obtaining, based on a current status and a target status of the imaging device, a correction profile relating to the imaging device, wherein the current status of the imaging device is determined based on the first scanning data, and the target status of the imaging device is determined based on the second scanning data;

adjusting the first scanning data based on the correction profile; and

generating, based on the adjusted first scanning data, an image relating to the first subject.

2. The method of claim 1 , further including:

obtaining, in response to determining that the imaging device satisfies the second condition, a second correction profile configured to calibrate the imaging device.

3. The method of claim 2 , further including:

updating a third correction profile stored in the imaging device by the second correction profile relating to the imaging device.

4. The method of claim 1 , wherein the second scanning data includes a response rate of each of the detector blocks, and the determining, based on the second scanning data, whether the imaging device satisfies the second condition includes:

acquiring a first group of detector blocks, each detector block of the first group having a response rate lower than a second threshold or exceeding a third threshold; and

determining whether a detector block count of the detector blocks belonging to the first group exceeds a first threshold.

5. The method of claim 1 , wherein the determining, based on first scanning data, whether the imaging device satisfies the first condition, comprises:

extracting first feature data from the first scanning data relating to the first subject; and

determining, based on the first feature data, whether the imaging device satisfies the first condition.

6. The method of claim 5 , wherein the imaging device includes a positron emission tomography (PET) device, and the first feature data relates to at least one of an energy peak corresponding to each of the at least one detecting element, a position of each of the detector blocks, or a time offset relating to a pair of detecting elements corresponding to a line of response.

7. The method of claim 5 , wherein the determining, based on the first feature data, whether the imaging device satisfies the first condition includes:

determining a difference between the first feature data and reference feature data; and

determining whether the difference between the first feature data and reference feature data exceeds a fourth threshold.

8. The method of claim 1 , wherein the first condition relates to a parameter of the imaging device, the parameter including at least one of a sensitivity of the detector, a spatial resolution of the imaging device, an energy resolution of the imaging device, or a time resolution of the imaging device.

9. The method of claim 1 , wherein

the first scanning data includes a radiation event count,

the first condition relates to the radiation event count, and

the determining, based on the first scanning data, whether the imaging device satisfies the first condition includes: the radiation event count equaling or exceeding a fifth threshold.

10. The method of claim 1 , wherein the first scanning data includes a body mass index of the subject, and the determining that the first scanning data from the subject satisfies the first condition includes:

determining whether the body mass index of the subject is in a range from a second threshold to a third threshold.

11. The method of claim 1 , wherein the imaging device includes a positron emission tomography (PET) device, and the first scanning data relates to a distribution of the radiation events corresponding to lines of response, and the determining that the first scanning data from the subject satisfies the first condition includes:

determining whether a half width of the distribution of the radiation events corresponding to the lines of response equals or exceeds a fourth threshold.

12. A method implemented on a computing device having at least one processor, at least one computer-readable storage medium, and a communication port connected to an imaging device including a detector, the detector including detector blocks, each detector block including at least one detecting element, the method comprising:

obtaining first scanning data relating to a first subject acquired by an imaging device;

determining whether the imaging device needs to be corrected by a process including: determining, based on the first scanning data, whether the imaging device satisfies a first condition;

in response to determining that the imaging device needs to be corrected, obtaining, based on a current status of the imaging device, a correction profile relating to the imaging device, wherein the current status of the imaging device is determined based on the first scanning data;

adjusting the first scanning data based on the correction profile; and

generating, based on the adjusted first scanning data, an image relating to the first subject.

13. The method of claim 12 , wherein the first scanning data includes a radiation event count, and the determining that the first scanning data from the subject satisfies the first condition includes:

determining whether the radiation event count of the first scanning data equals or exceeds a first threshold.

14. The method of claim 12 , wherein the first scanning data includes a body mass index of the subject, and the determining that the first scanning data from the subject satisfies the first condition includes:

determining whether the body mass index of the subject is in a range from a second threshold to a third threshold.

15. The method of claim 12 , wherein the imaging device includes a positron emission tomography (PET) device, and the first scanning data relates to a distribution of the radiation events corresponding to lines of response, and the determining that the first scanning data from the subject satisfies the first condition includes:

determining whether a half width of the distribution of the radiation events corresponding to the lines of response equals or exceeds a fourth threshold.

16. The method of claim 12 , wherein obtaining, based on a current status of the imaging device, a correction profile further comprises:

extracting feature data from the first scanning data;

determining, from the first scanning data and based on the feature data, second scanning data relating to radiation events; and

determining, based on the second scanning data, the correction profile relating to the imaging device, wherein the correction profile includes a plurality of correction coefficients corresponding to the feature data.

17. A system, comprising:

a computer-readable storage medium storing executable instructions, and

at least one processor in communication with the computer-readable storage medium, when executing the executable instructions, causing the system to implement a method, comprising:

obtaining first scanning data relating to a first subject acquired by an imaging device;

obtaining second scanning data relating to a second subject acquired by the imaging device, wherein the second subject is different from the first subject;

determining whether the imaging device needs to be corrected by a process including:

determining, based on the first scanning data, whether the imaging device satisfies a first condition; and

determining, based on the second scanning data, whether the imaging device satisfies a second condition; and

in response to determining that the imaging device needs to be corrected, obtaining, based on a current status and a target status of the imaging device, a correction profile relating to the imaging device, wherein the current status of the imaging device is determined based on the first scanning data, and the target status of the imaging device is determined based on the second scanning data;

adjusting the first scanning data based on the correction profile; and

generating, based on the adjusted first scanning data, an image relating to the first subject.

18. The system of claim 17 , further including:

obtaining, in response to determining that the imaging device satisfies the second condition, a second correction profile configured to calibrate the imaging device.

19. The system of claim 17 , wherein the second scanning data includes a response rate of each of the detector blocks, and the determining, based on the second scanning data, whether the imaging device satisfies the second condition includes:

acquiring a first group of detector blocks, each detector block of the first group having a response rate lower than a second threshold or exceeding a third threshold; and

determining whether a detector block count of the detector blocks belonging to the first group exceeds a first threshold.