| 摘要 |
PROBLEM TO BE SOLVED: To precisely detect a small node from a chest X-ray image. SOLUTION: In a computer supported diagnostic method for detecting a lung small node in a digitized chest image, this method takes the difference between the signal emphasized image and the signal suppressed image of the chest image to generate a difference picture (a), repeats the threshold value processing of the difference picture by plural threshold values concerning gradation while changing a threshold value, executes a prescribed morphological test to a pixel group with a value larger than each threshold value to specify the candidate of the small node (b), executes plural regular tests to the prescribed feature of the image appearing at the difference image and the chest image by corresponding spatially to excludes the small nodes of pseudo positive reaction from the candidates of the small nodes (c), and additionally excludes the small nodes of pseud positive reaction from the candidates of the residual small nodes at the step (c) by an artificial neural network to specify the residual candidates of the small nodes as the candidates of the true small nodes (d). |
