| 摘要 |
<p>The objective of the present invention is to decrease unwrapping errors. An X-ray imaging detector (13) detects X-rays which are emitted from an X-ray source (11) and which pass through a first grating (21) and a second grating (22), and generates image data. A phase differential image generating section (40) generates a phase differential image on the basis of the image data. A suitable/unsuitable region detector (42) detects unsuitable regions in which unwrapping errors tend to occur in the phase differential image, and sets the other regions as suitable regions. An unwrapping section (43) sets starting points (P0-P6) along a penetration line which only passes through the suitable regions and penetrates the phase differential image in one direction, and performs unwrapping along linear paths (R0-R6) orthogonal to the alignment direction of the starting points (P0-P6). The unwrapping section (43) also performs unwrapping between the starting points (P0-P6) and along wraparound paths (WR0, WR1) which pass through pixels in the suitable regions that remain behind the unsuitable regions when seen from the starting points (P0-P6).</p> |
