Search found 19 matches

by Rudolf Hellmuth
Wed Feb 14, 2024 7:56 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Large vessels of sheep
Replies: 2
Views: 293

Re: Large vessels of sheep

Thanks, David. If I manage to get the images, I will share the models here with the community.

BW
Rudolf
by Rudolf Hellmuth
Tue Feb 13, 2024 8:07 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Large vessels of sheep
Replies: 2
Views: 293

Large vessels of sheep

Hi, I wonder if anyone knows where I could find any reconstructed model or MRI/CT scans or sheep large vessels? I think I had seen some link to another website with many blood vessels systems, including animals, years ago on SimVascular's website, but I am not 100% sure. I guess it was a company sel...
by Rudolf Hellmuth
Wed Aug 24, 2022 6:01 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Measuring the centerline
Replies: 8
Views: 716

Re: Measuring the centerline

Hi, I have made a merge by distance filter to handle the new centrelines. It has fixed the issue for me. I am including the filter here in case anyone needs this workaround. FYI, my vessel has an average diameter of about 5 mm, and I have merged all points in the sequence whose distance is < 0.6 mm....
by Rudolf Hellmuth
Tue Aug 23, 2022 11:02 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Measuring the centerline
Replies: 8
Views: 716

Re: Measuring the centerline

The other message was no allowing me to upload more pictures. I will do it here. We have also found out that the algorithm that makes the centreline fails when the curvature of the vessel is high. We have scanned the superficial saphenous vein with the knee bent at 120 deg. The lofted vessel is smoo...
by Rudolf Hellmuth
Tue Aug 23, 2022 10:30 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Measuring the centerline
Replies: 8
Views: 716

Re: Measuring the centerline

Hi, I used to make many measures with the centreline with version 2018.08.09 and older ones. I have scripts that measure arc-length, curvature and separation angles between two branches. Separation angle as the angle a branch has compared to other branch if one branch's centreline would travel along...
by Rudolf Hellmuth
Mon Aug 03, 2020 3:56 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Structure of .ctgr files
Replies: 13
Views: 895

Re: Structure of .ctgr files

Hi Dave, I am using Windows 10. I remember having to convert one type of contour into another intermediary one, before converting again to the one I wanted, because SimVascular was crashing when I converted straight away to my end contour type. It involved spline loops, circles and ellipses, and per...
by Rudolf Hellmuth
Thu Jul 30, 2020 9:46 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Structure of .ctgr files
Replies: 13
Views: 895

Re: Structure of .ctgr files

Hi Dave, Sorry for not replying for a long time. I've been working on different projects, and could only come back to this one recently. I was able to change the contour type with your guidance, before I did many other changes, like cloning contour groups, best-fitting an ellipse to any shape, getti...
by Rudolf Hellmuth
Tue May 05, 2020 4:13 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Structure of .ctgr files
Replies: 13
Views: 895

Re: Structure of .ctgr files

Hi Dave, Thanks a million for your help. I wasn't expecting you writing more code, that was very kind of you. I was writing it a bit different, more object-oriented. You can see my draft attached, if you wish. I tested the output on SimVascular, and it worked fine. I've got now another question, how...
by Rudolf Hellmuth
Fri May 01, 2020 8:40 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Structure of .ctgr files
Replies: 13
Views: 895

Re: Structure of .ctgr files

Thanks for the hint, Dave. This is gonna be more difficult, since I must modify both control_points and contour_points. Could you please point me out in the source code, where one information generates the other? I suppose, I also have to care about the truncation of the last digit of the float numb...
by Rudolf Hellmuth
Wed Apr 29, 2020 5:04 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Structure of .ctgr files
Replies: 13
Views: 895

Re: Structure of .ctgr files

Hi David, I am trying to use these pieces of code to make a python script that inflates/shrinks the contours along the path. This is for artificially applying aneurysms and stenoses. As inputs I give a path.pth, a contour_group.ctgr, and a table of 'position along path' and 'cross-sectional area' (o...