Abstract: A positron emission tomography (PET) scanner is provided having a plurality of detector subsystems, including processing circuitry to determine, for each detector subsystem of the plurality of detector subsystems, a singles count loss correction factor of the detector subsystem; determine, for each detector subsystem pair of a plurality of pairs of the detector subsystems, a coincidence count loss correction factor for the detector subsystem pair; calculate a scanner coincidence count loss correction factor for the PET scanner based on the coincidence count loss correction factors determined for the plurality of pairs of the detector subsystems; and reconstruct an image based on the calculated scanner count loss correction factor and scan data acquired from a scan of a patient performed using the PET scanner.

Abstract: The invention discloses a method, a system, an apparatus for data storage, and a storage medium. The method for data storage medium includes: acquiring first data; grouping the first data to obtain K packet sub-data; inputting a preset primer into a random generator to obtain 4T random number sequences, 4T>K; determining the packet sub-data corresponding to the ith random number sequence, and performing exclusive or (XOR) operation on the determined packet sub-data to obtain data information DATAi, and obtaining a DNA molecular chain according to the data information DATAi, the preset primer and the generation times capacity of the random generator; performing DNA sequence synthesis on the plurality of DNA molecular chains to obtain target storage data. In the disclosure, in the process of coding the first data to obtain a DNA molecular chain, a random generator is added to greatly simplify the coding process and implement efficient and accurate coding on the first data.

Abstract: The disclosure includes: acquiring first data; grouping the first data to obtain K packet sub-data; inputting a preset primer into a random generator to obtain 4T random number sequences, 4T>K; determining the packet sub-data corresponding to the ith random number sequence, and performing exclusive or (XOR) operation on the determined packet sub-data to obtain data information DATAi, and obtaining a DNA molecular chain according to the data information DATAi, the preset primer and the generation times capacity of the random generator; performing DNA sequence synthesis on the plurality of DNA molecular chains to obtain target storage data. In the disclosure, in the process of coding the first data to obtain a DNA molecular chain, a random generator is added to greatly simplify the coding process and implement efficient and accurate coding on the first data. The disclosure may be widely applied to a field of data storage technologies.