it is crucial for vascular surgeon to confirm the position of intimal tear in aortic dissection even in low quality CTA
3D reconstruction from segmentation in this case sure can not provide a clear view of intimal tear
It’s probably possible to get similar volume rendering from Slicer with some work. But I would say that is a pretty high quality CTA and I would not expect you could get a rendering like that from a low quality CTA.
It looks like a basic volume raycasting with gradient opacity mapping enabled and surrounding stuctures cropped or masked.
Go to volume rendering and set gradient opacity mapping function value to 0 for low values. Also define a cropping region to get rid of surrounding structures. If you need tighter (non-rectangular) cropping then you can use Segment Editor and volume masking.
actually in a better quality CTA，intimal tear can be clearly seen through segmentation and adjust of transparency in 3D view，while in this case, 3D view from segmentation is a mess.
thanks,I will have a try