I have a CT on a dog that I doing a 3D modell from:
And this is the result
But the Word from the veterinary experts in that this wrong, the femur bone should be bigger. So the dimensions on the bone is not correct. We print this modell out and it does not look like reality, it needs to be perfect. Can it have with the position the dog have when the CT is taken? or can we trust the program to 100%?
the size and proportion of the femur looks normal to me as a person who assembled over 200 pieces of dog skeletons. Some dogs (especialy mongrel dogs) can have interesting sizes according their bones.
Of course it is only my suggestion, not a software specific answer:)
Slicer reconstructs models from volumes very robustly and accurately. DICOM image import is the only part of the workflow that might go wrong in case the scanner saves images that are not fully compliant to the DICOM standard.
What CT scanner brand/model do you use?
What image resolution and slice spacing was set in the scanner?
What image spacing values do you see in Volumes module / Volume Information / Image Spacing?
Did you use DICOM module to load the image? Did you get any warning when you loaded the image?
Thanks for your answer, I do this for a costumer and only geat the CT link by email. But I can check this up, but not any no warning when I load the image. yes I use the DICOM module to load the image.
You can find CT scanner manufacturer/model in DICOM fields: in DICOM module, select your image series and click Metadata button (look for Manufacturer and ManufacturerModelName fields). It is important to know this because clinical scanners implement DICOM standard correctly, but many microCTs, industrial, or pre-clinical devices have faulty implementation.
When you are developing a new workflow, with new devices, data formats, processing steps, etc. it is always advisable to use test data sets for that ground truth is available. For your case, you could start with scanning a rigid object, such as a bone phantom (or just any object that you can measure and compare to the final 3D-printed object).