Dear Yujie,
Concerning fig. 1, the dimensions seem to be a 176 x 176 matrix in-plance and 8 slices with a thickness of 3 mm, and for fig. 2 it's a 192 x 192 matrix and again 8 slices but a thickness of 8 mm. The display as such seems to correspond to the settings = only these few slices are shown for the corresponding orientation.
Whether this really corresponds to the acquired data or not and whether some error occured during conversion is difficult to guess. Please check the raw DICOM data (if available) or the sequence settings at the scanner, so did you indeed just acquire 8 slices or not.
Best,
Helmut
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