| 摘要 |
PROBLEM TO BE SOLVED: To obtain a projection image with particularly improved S/N resolution from MRI three-dimensional data by obtaining the average value of several pixels in the vicinity of the projection direction for all pixels to project, obtain the largest value of the obtained data, and making the obtained data to be the projection data. SOLUTION: The average of pixels (c) at two adjoining points is taken at the position of noises 80 only, and this result is shown (d). The amplitude becomes smaller by taking average of pixels, since noises in MRI apparatus are random. The pixels of noises 80 only on the projecting plane 70 are as shown right (d), and the amplitude of pixels on the projecting plane 70 becomes smaller. Similarly, the average (d down) of the adjoining pixels (c down) in x, y positions containing a signal 90 is taken. This time the amplitude of the signal 90 hardly changes by taking average of adjoining pixels. Taking average of adjoining pixels reduces the amplitude of noises 80, but hardly changes the amplitude of signals. Thereby, the amplitude of signals is projected (d down) on the projecting plane 70. |
