CN-121987229-A - Imaging method, system and device

Abstract

The embodiment of the specification provides an imaging method, an imaging system and an imaging device, wherein the imaging method is applied to imaging equipment, the imaging equipment comprises at least two ray sources and at least one detector, the imaging method comprises the steps of acquiring at least two sets of projection data of a target object, wherein each set of projection data corresponds to one ray source, the at least two sets of projection data correspond to different projection angles respectively, the at least two sets of projection data are collected in the same time period, determining combined projection data according to the at least two sets of projection data, and generating an image of the target object according to the combined projection data.

Inventors

• YAN JING
• FENG JUAN

Assignees

• 上海联影医疗科技股份有限公司

Dates

Publication Date

20260508

Application Date

20241106

Claims (10)

1. 1. A method of imaging, the method being applied to an imaging apparatus comprising at least two radiation sources and at least one detector, the method comprising: acquiring at least two groups of projection data of a target object, wherein each group of projection data corresponds to one ray source, the at least two groups of projection data correspond to different projection angles, and the at least two groups of projection data are acquired in the same time period; Determining combined projection data from the at least two sets of projection data; and generating an image of the target object according to the combined projection data.
2. 2. The method of claim 1, wherein the imaging device comprises at least two detectors; the method further comprises: Determining a perfusion parameter of the target object according to the image of the target object; And generating a perfusion imaging map of the target object according to the perfusion parameters.
3. 3. The method of claim 1, wherein the at least two sets of projection data partially overlap between different projection angles.
4. 4. A method as claimed in claim 3, wherein said determining combined projection data from said at least two sets of projection data comprises: averaging the overlapping parts of the projection angles in the at least two groups of projection data to obtain overlapping projection data; and determining a part, which is not overlapped in projection angles, of the at least two sets of projection data and the overlapped projection data as the combined projection data.
5. 5. The method of claim 1, wherein there is a spacing between different ones of the projection angles.
6. 6. The method of claim 5, wherein determining combined projection data from the at least two sets of projection data comprises: determining estimated projection data corresponding to the angle of the interval according to the at least two sets of projection data; The at least two sets of projection data and the estimated projection data are determined as the combined projection data.
7. 7. The method of claim 1, wherein different ones of the projection angles are continuous.
8. 8. The method of any of claims 1-7, wherein the at least two radiation sources are spaced apart or the at least two radiation sources emit radiation at the same energy level to acquire the at least two sets of projection data.
9. 9. An imaging system, the system comprising: The acquisition module is configured to acquire at least two groups of projection data of a target object, each group of projection data corresponds to a ray source, the at least two groups of projection data respectively correspond to different projection angles, and the at least two groups of projection data are acquired in the same time period; a determining module configured to determine combined projection data from the at least two sets of projection data; And the generation module is configured to generate an image of the target object according to the combined projection data.
10. 10. An imaging apparatus, comprising at least one processor and at least one memory; the at least one memory is configured to store computer instructions; the at least one processor is configured to execute at least some of the computer instructions to implement the imaging method of any one of claims 1-8.

Description

Imaging method, system and device Technical Field The present disclosure relates to the field of medicine, and in particular, to an imaging method, system, and apparatus. Background Perfusion imaging techniques are an important tool for medical diagnosis. Perfusion imaging techniques can utilize the flow and distribution of contrast agent in tissue to observe local blood flow changes and vascular permeability to assess the blood flow supply and demand of the tissue. During perfusion imaging, the process of circulating the contrast agent in the body can be captured by injecting the contrast agent into a patient and performing continuous CT scanning, so that the blood flow perfusion condition of tissues can be estimated. In the traditional perfusion imaging technology, a single ray source is generally adopted for scanning, the sampling number is small, the scanning period is long, and the quality of the obtained medical image is affected to a certain extent. In view of this, the present embodiments provide an imaging method, system, and apparatus to obtain a medical image of higher quality. Disclosure of Invention One or more embodiments of the present disclosure provide an imaging method, where the imaging method is applied to an imaging device, and the imaging device includes at least two radiation sources and at least one detector, and the method includes acquiring at least two sets of projection data of a target object, where each set of projection data corresponds to one of the radiation sources, the at least two sets of projection data correspond to different projection angles, the at least two sets of projection data are acquired in a same time period, determining combined projection data according to the at least two sets of projection data, and generating an image of the target object according to the combined projection data. In some embodiments, the at least two radiation sources are spaced apart. In some embodiments, the at least two sets of projection data partially overlap between different projection angles. In some embodiments, determining combined projection data according to the at least two sets of projection data comprises averaging overlapping projection angles in the at least two sets of projection data to obtain overlapping projection data, and determining non-overlapping projection angles in the at least two sets of projection data and the overlapping projection data as the combined projection data. In some embodiments, there is a space between the different projection angles. In some embodiments, determining combined projection data from the at least two sets of projection data includes determining estimated projection data corresponding to the angle of the gap from the at least two sets of projection data, and determining the at least two sets of projection data and the estimated projection data as the combined projection data. In some embodiments, the projection angles are consecutive. In some embodiments, the at least two radiation sources emit radiation at the same energy level to acquire the at least two sets of projection data. One or more embodiments of the present disclosure provide an imaging system, which includes an acquisition module configured to acquire at least two sets of projection data of a target object, each set of projection data corresponding to a radiation source, the at least two sets of projection data corresponding to different projection angles, respectively, the at least two sets of projection data being acquired at a same time period, a determination module configured to determine combined projection data according to the at least two sets of projection data, and a generation module configured to generate an image of the target object according to the combined projection data. One or more embodiments of the present specification provide an imaging apparatus comprising at least one storage medium storing computer instructions and at least one processor executing the computer instructions to implement an imaging method as described in any of the embodiments above. Drawings The present specification will be further elucidated by way of example embodiments, which will be described in detail by means of the accompanying drawings. The embodiments are not limiting, in which like numerals represent like structures, wherein: FIG. 1 is a schematic illustration of an application scenario of an imaging system according to some embodiments of the present description; FIG. 2 is an exemplary flow chart of an imaging method shown in accordance with some embodiments of the present description; FIG. 3 is a schematic illustration of a source scanning process shown in accordance with some embodiments of the present description; FIG. 4 is a schematic illustration of determining overlapping projection data, shown in accordance with some embodiments of the present description; FIG. 5 is a schematic illustration of determining combined projection data, shown in accordance with so