公开(公告)号：US20180025513A1

公开(公告)日：2018-01-25

申请号：US15541962

申请日：2015-01-09

Applicant: SHIMADZU CORPORATION

Inventor： Tommonori SAKIMOTO ,  Kazuyoshi NISHINO

IPC: G06T11/00 ,  G06T3/40 ,  A61B6/03 ,  A61B6/04 ,  A61B6/00

CPC classification number: G06T11/008 ,  A61B6/025 ,  A61B6/03 ,  A61B6/04 ,  A61B6/4208 ,  A61B6/461 ,  A61B6/487 ,  A61B6/5205 ,  A61B6/5258 ,  A61B6/54 ,  G06T3/4007 ,  G06T11/006 ,  G06T2207/10116

Abstract: An image processing element 9 of the present invention includes a weighting factor setting element 9a that sets up a weighting factors wnn, wbi of the weight addition combing a nearest neighbor interpolation and a bilinear interpolation based on an absolute value |Ibi−Inn| of the difference between the pixel value acquired by the nearest neighbor interpolation and the pixel value Inn acquired by the bilinear interpolation; and a weight addition element 9b that implement a weighting addition based on the set-up weighting factors wnn, wbi. A reconstructed image can be acquired by arranging the backprojection pixel value Inew every pixel following the weighting. A reconstructed image can be obtained in which any noise and artifacts are reduced by setting the weighting factor of the image processing algorithm causing a negative effect on the region of some pixel values to be minimal and setting the weighting factor of the (other) image processing algorithm causing a positive-effect on the same pixel value region to be maximum based on the absolute value |Ibi−Inn| of the difference.