Patent ID: 11860111
Assignee: NIKON CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The image reconstruction method for an X-ray measuring device according to claim 1, wherein
generating multiple sets of the detection data by detecting the X-ray that passed through the measurement object by irradiating the X-rays to the measurement object in each of multiple different irradiation directions;
generating multiple sets of estimated data by estimating the X-rays that are assumed to have been passed through the estimated structure in each of the multiple different irradiation directions of the X-rays;
an image is generated by performing a back projection image that has been generated by performing back projection of the multiple sets of extracted differential data, those have been generated in each of the multiple different irradiation directions of the X-rays, with the estimated structure.