Operating system: Windows 10
Slicer version: 4.10.1
Expected behavior: Draw ROIs manually without artifacts and measure the ROI volumes correctly.
Actual behavior: Stripe artifacts or scattered dots appeared in the slice next to the slice I draw ROIs using Draw Effect, Paint Effect and Eraser in the Segment Editor module.
Dear the member of the 3D Slicer Forum,
I tried the following procedures in order to delete artifacts, however, I am not sure they are appropriate for drawing ROIs on the brain image and measure ROI volumes correctly.
Thus, I would like to have your review for the following procedures I performed, and have your advice if they are not appropriate.
Although the stripe artifacts could be deleted, the angle of the brain (i.e. AC-PC line in the sagittal slice) was changed after clicking the icon in the Segment Editor module (please see the yellow circle of the attached first file named “ICON”).
I could correct this change by going to Transforms module, create new Linear Transform, and apply “gray scale MRI (in this case, file named “b12”)” to Transformed box (but not apply “Segmentation”).
Please see red circles in the attached second file named “Transforms”.
Then, I could draw color with Paint Effect and Draw Effect on the corrected brain position going to Segment Editor module.
In this step, I selected Segmentation in the column of “Segmentation” and b12 (the file name of gray scale MRI) in the column of “Master volume” (please see red circles in the attached third file named “Segment Editor”).
At last, I went to the Segment Statistics module, select Segmentation in the column of “Segmentation” and b12 (the name of the gray scale file) in the column of “Scalar volume”, and click Apply.
I would like to have your advice if there is any misunderstanding for the procedures above.
I appreciate your time and kind advice.
First file ICON:
Second file Transforms:
Third file Segment Editor: