| 摘要 |
PROBLEM TO BE SOLVED: To reduce a time delay before an image is started to be reconstructed, by carrying out a Radon inverse transformation to a collected subset, generating a partial image reconstruction of a three-dimensional ROI (concerned area) of an object, and setting a cone beam radiation source, a two-dimensional detector apparatus for the image reconstruction of the three-dimensional ROI of the object. SOLUTION: A manipulator 306 responds to a control signal of a computer 308, thereby scanning a beam source 310, a detector 312 along an X-ray source scan path. A measured data set attenuated by an object 316 and detected at the detector 312 is digitized at a data collection system 317. A measurement data which generates a subset at a block 320 is transformed to a differential data. A Radon differential data is transformed at a block 322 to a Radon data at a polar lattice point, and the Radon data is subjected at a block 324 to a three-dimensional Radon inverse transformation. The image data is stored at a block 326 and three-dimensionally CT displayed at a display 328 via a reconstruction processor 318. |
