| 摘要 |
PURPOSE:To obtain an intertomographic images subtraction image devoid of the noise elements, by collecting tomographic images of 2 sliced surfaces by the multi-slicing method in such a way that the noise elements become identical, and subtracting them. CONSTITUTION:As irregularities are observed caused by time wise and spacewise reasons of a magnetic field, first sliced surface and second one are allowed to approach each other timewise and spacewise and noise elements on both surfaces are collected in the identical state. Operations are performed by a selective exciting pulse setting controlling means 14. In an image-reconstructing means 13, in a selector 18, it is so arranged that data regarding the first sliced surface are delivered to the first image memory 19 and those regarding the second sliced surface to an image memory 20. Next, each memory from first and second memories 19, 20 is delivered to a differential image generator unit 21 as an output and here, performing subtracting calculation, a subtraction image is constructed. |
