| 摘要 |
<P>PROBLEM TO BE SOLVED: To highly accurately detect a tumor region. <P>SOLUTION: The X-ray CT apparatus 100 is equipped with a scanner apparatus 1, a processing apparatus 2, a large capacity storage apparatus 3, a display monitor 4, and an inputting apparatus 5. The processing apparatus 2 is equipped with a data-obtaining unit 2a, a blood vessel candidate region-extracting unit 2b, a blood vessel region-extracting unit 2c, a tumor candidate region-extracting unit 2d, and a tumor region-detecting unit 2e. In this case, the data-obtaining unit 2a inputs a plurality of continuous CT tomographic images which are obtained by performing an X-ray scanning for a subject at different tomographic locations. The blood vessel candidate region-extracting unit 2b extracts blood vessel candidate regions in a plurality of the continuous CT tomographic images based on CT values. The blood vessel region-extracting unit 2c determines a region wherein the volume of an external contact rectangular parallelepiped is larger as a blood vessel region from among blood vessel candidate regions. The tumor candidate region-extracting unit 2d applies a contracting process to the blood vessel region, and determines an isolated region as a tumor candidate region. The tumor region-detecting unit 2e detects a tumor region based on three-dimensional characteristics of the tumor candidate region. <P>COPYRIGHT: (C)2003,JPO |
