CT inspection system and CT imaging method for a reciprocating swinging process of a radioactive source device and a detection device around an object at non-uniform speed to collect effective detection data
The present disclosure relates to the technical field of CT detection, in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure includes a scanning device and an imaging device, wherein the scanning device having a radioactive source device and a detection device is configured to rotate at a nonuniform speed in at least partial process of scanning an object to be detected; and the imaging device generates a CT image based on effective detection data, wherein the effective detection data refer to data acquired each time the detection device rotates by a preset angle. In the present disclosure, the imaging device of the CT inspection system generates a CT image based on data acquired each time the detection device rotates by a preset angle, which, compared with traditional image collection solutions, can effectively reduce image deformation and improve accuracy of detection results.
1. A CT imaging method, comprising the following steps:
scanning an object to be detected by a radioactive source device and a detection device of a scanning device, wherein the scanning device rotates at a non-uniform speed in at least partial process of scanning;
detecting a rotating angle of the scanning device by a rotation monitoring device, and sending a signal by the rotation monitoring device to an imaging device each time the scanning device rotates by a preset angle;
determining effective detection data by the imaging device according to the signal sent by the rotation monitoring device; and
generating a CT image by the imaging device based on the effective detection data, wherein the effective detection data refer to data of the detection device acquired each time the scanning device rotates by the preset angle.
2. The CT imaging method according to claim 1 , wherein detecting a rotating angle of the scanning device by a rotation monitoring device, and sending a signal by the rotation monitoring device to an imaging device each time the scanning device rotates by a preset angle comprises:
detecting a position of the scanning device by a position detection device when the scanning device scans the object to be detected by a data acquisition device of a data collecting and selecting device; and
according to detection results of the position detection device, determining the rotating angle of the scanning device, and sending a signal to the imaging device each time the scanning device rotates by the preset angle by a rotation control device of the rotation monitoring device.
3. The CT imaging method according to claim 1 , wherein determining effective detection data by the imaging device according to the signal sent by the rotation monitoring device, and generating a CT image by the imaging device based on the effective detection data comprises:
acquiring the effective detection data by a data collecting and selecting device of the imaging device, and transmitting the effective detection data by the data collecting and selecting device to an image processing device of the imaging device; and
generating a CT image by the image processing device based on the effective detection data transmitted by the data collecting and selecting device.
4. The CT imaging method according to claim 3 , wherein
acquiring the effective detection data by a data collecting and selecting device of the imaging device comprises:
receiving data of the detection device corresponding to signals of the rotation monitoring device as the effective detection data by the data collecting and selecting device.
5. The CT imaging method according to claim 3 , wherein acquiring the effective detection data by a data collecting and selecting device of the imaging device, and transmitting the effective detection data by the data collecting and selecting device to an image processing device of the imaging device comprises:
acquiring data of the detection device by a data acquisition device of the data collecting and selecting device; and
selecting the effective detection data by an image collection device of the data collecting and selecting device from the data of the detection device acquired by the data acquisition device, and transmitting the effective detection data to the image processing device by the image collection device.
6. The CT imaging method according to claim 5 , further comprising:
transmitting the signal from the rotation monitoring device to the image collection device by the data acquisition device;
wherein selecting the effective detection data by an image collection device of the data collecting and selecting device from the data of the detection device acquired by the data acquisition device comprises:
receiving data of the detection device corresponding to the signal of the rotation monitoring device as the effective detection data by the image collection device.
7. The CT imaging method according to claim 3 , wherein acquiring the effective detection data by a data collecting and selecting device of the imaging device, and transmitting the effective detection data by the data collecting and selecting device to an image processing device of the imaging device comprises:
acquiring the effective detection data by a data acquisition device of the data collecting and selecting device; and
transmitting the effective detection data by the data acquisition device to the image processing device via an image collection device of the data collecting and selecting device.
8. The CT imaging method according to claim 7 , wherein acquiring the effective detection data by a data acquisition device of the data collecting and selecting device comprises:
acquiring data of the detection device when receiving signals of the rotation monitoring device as the effective detection data by the data acquisition device.