| 摘要 |
PROBLEM TO BE SOLVED: To improve an image quality without drastically increasing calculation amount of an interpolation calculation in constituting a three-dimensional image, etc. SOLUTION: When calculating an interpolation point P6, at first, variable quantity Δ between P5 and P7 is calculated. When the variable quantity Δexceeds a set value s, highly precise high-order interpolation is performed using four measurement points P3, P5, P7, and P9, and when it does not exceed the set value s, a liner interpolation is performed only using the two measurement points P5 and P7. The interpolation precision can be improved by selectively changing the interpolation calculation. When a CT(Computerized Tomography) value exceeds the set value in a part having higher CT value compared with the other organ tissues, for example, a bone, the high precision interpolation is performed. This method can improve the interpolation precision and improve the image quality without increasing the calculation amount. |
