| 摘要 |
<p>To avoid needless image processing to remove an after image, a first fixed pattern noise image is acquired prior to switching to the radiography mode and it is determined from the fixed pattern noise image data whether or not the significant after image is present or not (step S204). If it is determined that an after image is present, a decision is then made whether or not to erase the after image. Thus, for example, if radiography should be executed soon, or the amplitude of the after image is negligible, or the after image is present outside of the region of interest in the radiographic image, or radiography can be executed while avoiding the after image, there is no need to erase the after image and the procedure can then advance to setting and executing the radiographic mode without after image erase processing (step S210). Whether or not a significant after image is present (step S204) may be judged by determining the uniformity of values of pixels contained in the fixed pattern noise image. This uniformity check may be performed on fixed pattern noise image acquired at the time of performing white image radiography prior to executing the actual radiography or, alternatively, may be performed on the basis of a second fixed pattern noise image obtaining after carrying out white image radiography.</p> |
