I am currently evaluating the effects of hypertensive disorders of pregnancy on white matter in children using pediatric brain MRI data and 3D Slicer. After performing image alignment on 3DT1 images using SPM12, I noticed that the alignment adjustments were not reflected when checking the images in 3D Slicer.
Steps Taken:
- In SPM12, I used the Display tab to load the images and adjusted the
pitch, roll, and yaw
values for alignment.
- The alignment values were within approximately ±0.2, with fine adjustments in the range of 0.0X.
- After performing the alignment, I executed reslice processing and then loaded the images into 3D Slicer.
- Result: The alignment adjustments were not reflected.
Test Results:
pitch = 0.5
→ The alignment was reflected correctly.pitch = 0.4
→ The alignment was reflected, but the output image was identical to the one generated withpitch = 0.5
.pitch = 0.3
→ The alignment was reflected, but again identical to thepitch = 0.5
image.pitch = 0.2
→ The alignment was not reflected.
From these results, I suspect that the pitch
values are being rounded, as follows:
0.1 → 0, 0.2 → 0, 0.3 → 0.5, 0.4 → 0.5, 0.5 → 0.5
.
Question:
Could you advise me on the appropriate steps or settings to ensure that the alignment results from SPM12 are accurately reflected when viewed in 3D Slicer?