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Document Type and Number:
Japanese Patent JP5860003
Kind Code:
An image detector is disposed behind a grid. The image detector has normal pixels and measurement pixels. Out of a group of measurement pixels based on which an average value of dose measurement signals is calculated, a [C/D] number of measurement pixels are disposed or chosen in a cycle Z=(R×C)±D. Wherein, C represents a cycle of a repetition pattern appearing in an arrangement direction of X-ray transparent layers and X-ray absorbing layers in an X-ray image of the grid, and is represented in units of the number of pixels. R represents a natural number of 0 or more. D represents an integer less than the cycle C. [C/D] represents a maximum integer equal to or less than C/D. Provided that at least the [C/D] number of measurement pixels are shifted C occasions by one pixel, if D=1, the average value of the dose measurement signals is invariable without any variations.

Takashi Tajima
Ken Kuwahara
Kitagawa Yusuke
Application Number:
Publication Date:
February 16, 2016
Filing Date:
May 23, 2013
Export Citation:
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FUJIFILM Corporation
International Classes:
A61B6/06; A61B6/00
Domestic Patent References:
Foreign References:
Attorney, Agent or Firm:
Kazunori Kobayashi