| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image processing apparatus capable of stably performing a gradation processing of a pectoral X-ray image without depending on a lung field detecting technique, and an X-ray image diagnostic apparatus. <P>SOLUTION: A vertebra distribution region 52 including a vertebra region in which the vertebra of a body to be examined is photographed, is set based on a pixel value or at least one of the pixel position in the pectoral X-ray image to the pectoral X-ray image obtained by photographing the pectoral part of the body to be examined, and the vertebra distribution region 52 is divided into a plurality of small regions 53a, 53b, 53c... standing in a line along the body axial direction of the pectoral part X-ray image. Then, on respective small regions 53a, 53b, 53c..., first profiles 54a, 54b, 54c...showing the distribution of characteristic quantities of the pixel values of the pixel rows standing in a line along the body axial direction are formed, and the pixels corresponding to the pixel values being at most a first threshold value determined based on the minimum value in the first profile, are extracted from respective small regions as a vertebra region 56. The characteristic quantity of the pixel value of the extracted vertebra region 56 is calculated, and the gradation processing is performed so that the characteristic quantity becomes a target value. <P>COPYRIGHT: (C)2012,JPO&INPIT |
