zhangjy-ge
commented
5 months ago Hi,
- While I understand how to shift the phantom in the xy direction, I'm curious if there are techniques to modify its length along the z-axis. Yes, you can change length in the z-axis by modifying the third value of
object.half_axes(1,:) = [108.000000 108.000000 50.000000];in phantom file likehttps://github.com/xcist/main/blob/master/gecatsim/phantom/W20.ppm - Specifically, I'm interested in adjusting the phantom's appearance across multiple slices, allowing certain aspects to appear or disappear as needed. I am not sure about this question. Did you mean change X/Y size at different z positions? If yes, you can achieve this by using multiple analytic objects with different offset/size, I guess.
- Also is there any way to create more complex shapes from equations or is the analytic phantom limited to elliptical shapes. So far we only support limited number of shapes including elliptical shapes. If you want to use complex shapes, I would suggest you to use voxelized or NCAT phantoms.
tims3900
Hello, I'm interested in creating an analytic phantom and was wondering if there is any documentation available for reference. While I understand how to shift the phantom in the xy direction, I'm curious if there are techniques to modify its length along the z-axis. Specifically, I'm interested in adjusting the phantom's appearance across multiple slices, allowing certain aspects to appear or disappear as needed. Also is there any way to create more complex shapes from equations or is the analytic phantom limited to elliptical shapes.