The embodiment of the invention discloses a data processing method and a data processing device. The method comprises the following steps: a boundary of a chordal graph is analyzed; instant conformation data which are not included in a real conformation data area are acquired, and scattering distribution data and random conformation data are determined through the instant conformation data; the instant conformation data are processed; concretely, the random conformation data are determined in the instant conformation data included in the real conformation data by utilizing a regulated second correction factor, hereby, the random conformation data are acquired by the instant conformation data, the second correction factor is set for the random conformation data, and the regulated second correction factor is acquired by regulating the second correction factor and comparing a first error value with a second error value; therefore, the random conformation data determined from the instant conformation data by utilizing the regulated second correction factor are relatively correct.

Data processing method and device

The invention provides a count loss correction method and device for a PET (Positron Emission Tomography) system. According to a Block structure of a detector, influences of a true coincidence count rate loss are decomposed to influences of a lost single photon count on the Block and influences of a received single photon count, a function relation between a Block single photon count rate and a Block single photon count rate loss correction factor and a function relation between a single photon count rate and a coincidence loss correction factor are built respectively, and the two function relations are used for count loss correction. The correction method solves the influences of the single photon distribution difference on the count loss, the total value accuracy of the true coincidencecount after correction can be improved, the coincidence data distribution accuracy can also be improved, the reconstructed image quality is improved, and the quantitative analysis accuracy is improved.

Count loss correction method and device for PET (Positron Emission Tomography) system

The invention provides an image reconstruction method and device. The method comprises: scanning data in a continuous in-bed scanning mode is obtained; an actual crystal is corresponding to one or more virtual crystals virtually, and delay random fit data of the response line of the virtual crystal is obtained according to the scanning data; the crystal receiving efficiency of the actual crystal is used to de-noise the delay random fit data to obtain de-noised random fit data; and the de-noised random fit data is used to conduct image reconstruction. In embodiments of the invention, the random fit data satisfying image reconstruction needs can be used during image reconstruction, so that de-noising of the delay random fit data is achieved, thus the data for image reconstruction is more accurate, and the quality of image reconstruction is improved.

Image reconstruction method and device

The application provides a counting loss correction method and device of a continuous increment PET (positron emission tomography) system, wherein the method comprises: determining a plurality of actual response lines corresponding to each virtual response line in a virtual system corresponding to the PET system, wherein each actual response line corresponds to a scan status of the actual system; in each scan status, acquiring single-photon counting rate of actual crystal according to single-photon counting rate of a virtual crystal corresponding to each actual crystal; determining single-photon counting rates of Blocks where the two actual crystals corresponding to each actual response line locate in the corresponding scan status; acquiring counting loss correction factors of the two Blocks to obtain counting loss correction factors of the actual response lines; determining counting loss correction factors of the virtual response lines, and performing counting loss correction according to the counting loss correction factor of each virtual response line. The counting loss correction method and device according to the application provide counting loss correction for continuous increment PET.

Counting loss correction method and device of continuous increment PET (positron emission tomography) system

The invention provides an image reconstruction method and device. The method comprises the steps of acquiring immediate coincidence data, delayed coincidence data and a single event count obtained by scanning a subject; according to the immediate coincidence data, the delayed coincidence data and the single event count, determining a true coincidence single event influence parameter which is used for representing a delayed coincidence data deviation caused by participation of true coincidence single events in the immediate coincidence data in delayed coincidence; correcting the delayed coincidence data by using the true coincidence single event influence parameter and obtaining corrected random coincidence data through iteration; performing image reconstruction according to the random coincidence data and scanning data obtained by scanning the subject. The method and the device can improve the quality of reconstructed images.

An image reconstruction method and device

The invention provides a random noise correction method and device. The method includes the steps of collecting scanning data of a detector to obtain an immediate chordal graph, a delay chordal graph and a single photon counting rate, obtaining a distribution chordal graph according to the single photon counting rate, distributing data sum of the delay chordal graph to the distribution chordal graph to obtain a random chordal graph, and utilizing the random chordal graph to correct the immediate chordal graph to obtain a correction chordal graph. The random chordal graph is generated by the distribution chordal graph obtained through the delay chordal graph and the single photon counting rate, the delay chordal graph is small in system error, the distribution chordal graph is small in statistical error, and therefore the random chordal graph obtained through the delay chordal graph and the distribution chordal graph is small in system error and statistical error and the correction chordal obtained through correction of the immediate chordal graph through the random chordal graph is small in system error and statistical error.

Random noise correction method and device

The invention provides a de-noising method and an apparatus for image reconstruction. The method is designed to remove noise caused in image reconstruction when an object undergoes a scanning process in a continuous in-bed scanning mode. The method is performed through the following steps: based on the plurality of single photon counting components for a scanning position, obtaining the single photon counting rates of the virtual crystals at the scanning position; determining the two virtual crystals at the responding line at the scanning position as well as the individual real crystals matched with the virtual crystals at the responding line; and according to the single photon counting rates of the two virtual crystals as well as the crystal receiving rates of the individual real crystals, obtaining the random satisfactory data for the responding line. The random satisfactory data for the responding line are used to remove noise in the image reconstruction. The method and the apparatus raise the quality in image reconstruction.

De-noising method and apparatus for image reconstruction

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Random noise correction method and device

De-noising method and apparatus for image reconstruction