Appeal No. 2004-0021 Page 5
Application No. 09/246,193
arranged grids having pitches different from each other and a detector grid array 23
having a similarly enlarged configuration of the objective grid array, and a detector array
24 constitute a detection system. An energy ray such as an X-ray which has been
transmitted through the grid system 25 is detected by the detector array 24 while
rotating an object 20 under observation placed on a rotary table 21. A signal
processing means 28 subjects signals detected by the detector array 24 to inverse
Fourier transform to synthesize an image of the object 20, and the image is displayed
on a display 29. Oda teaches (column 7, lines 58-60) with reference to Figure 4 that
"the position of the focal point F can be changed by changing the distance b between
the objective grid array and the detector grid array." Oda further teaches (column 8,
lines 1-11) that
In FIG. 1, the grid system 25 is fixed and the object under observation is
rotated. To the contrary, however, an object under observation and the grid
system 25 may be fixed and rotated about the center axis, respectively, to obtain
the same data and in turn to synthesize an image of the object under
observation.
According to this embodiment, although the grid system or an object
under observation is required to be rotated, a simplified system structure is
advantageously realized owing to only a small number of the individual detector
units being required.
The appellant argues through both briefs that the claimed "means for
simultaneously rotating said first and second plate and translating said first plate
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