The invention relates to a CT (
Computed Tomography) device and a CT
image generation method, wherein while the images of an object are processed, the data of the images are orderly stored in specified direction, and a multi-core processor is utilized to carry out
back projection / projection
processing of multiple threads in parallel in such a manner that each thread is orderly processed in a direction orthogonal to the specified direction, and as a result, three-dimensional CT images can be obtained and output. In this way, as the multi-core processor, for example,a GPU (
Graphics Processing Unit), is utilized, the CT
image generation method is high in flexibility and less in limitations, and the technical problem that the
processing speed is limited by the bandwidth. In the meantime, when the multi-core processor is used for
processing data in storage and
back projection / projection processing, the rule of multi-threaded
internal memory access of the multi-core processor, for example, the GPU, is taken into full consideration, the cache
hit ratio is increased, combined access is realized and the access speed of the
internal memory is greatly increased. As a result, the operational capability of the processor is sufficiently developed in CT image reconstruction and the
operating speed of the CT image reconstruction is greatly increased.